Magnification (M) refers to the degree of enlargement or reduction of an image compared to the original object. When M > 1, the image is magnified; when M < 1, the image is reduced; and when M = 1, the image has the same size as the object.
To find the image of a faraway object using a convex lens, a converging lens is typically used. The image will be formed on the opposite side of the lens from the object, and its location can be determined using the lens equation and the magnification formula.
A magnifying lens is a convex lens with a shorter focal length. It works by creating a virtual, magnified image of the object that appears larger when viewed through the lens.
1. M > 1 (Magnification): When the magnification (M) is greater than 1, the image is magnified. This means that the size of the image is larger than the size of the object. It is commonly observed in devices like magnifying glasses or telescopes, where objects appear bigger and closer.
2. M < 1 (Reduction): When the magnification (M) is less than 1, the image is reduced. In this case, the size of the image is smaller than the size of the object. This type of magnification is used in devices like microscopes, where small objects need to be viewed in detail.
3. M = 1 (Unity Magnification): When the magnification (M) is equal to 1, the image has the same size as the object. This occurs when the image and the object are at the same distance from the lens. It is often seen in simple lens systems used in photography or basic optical systems.
To find the image of a faraway object using a convex lens, a converging lens is used. The image will be formed on the opposite side of the lens from the object. The location of the image can be determined using the lens equation:
1/f = 1/d₀ + 1/dᵢ
where f is the focal length of the lens, d₀ is the object distance, and dᵢ is the image distance. By rearranging the equation, we can solve for dᵢ:
1/dᵢ = 1/f - 1/d₀
The magnification (M) can be calculated using the formula:
M = -dᵢ / d₀
A magnifying lens is a convex lens with a shorter focal length. It works by creating a virtual, magnified image of the object that appears larger when viewed through the lens. This is achieved by placing the object closer to the lens than its focal length.
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A beam of blue light with a wavelength of 450 nm and a frequency of 7.0 x 10^14 Hz goes into a glass with the index of refraction of 1.50. Find its (a) wavelength, (b) frequency, and (c) speed in the glass.
(a) The wavelength of the blue light is approximately 300 nm.(b) The frequency of the blue light is approximately 1.0 x 10^15 Hz. (c) The speed of the blue light in the glass is approximately 2.00 x 10^8 m/s.
(a) When light enters a medium with a different refractive index, its wavelength changes. The formula for calculating the wavelength in a medium is λ = λ₀/n, where λ₀ is the wavelength in vacuum and n is the refractive index of the medium. Substituting the values, we get λ = 450 nm / 1.50 = 300 nm.
(b) The frequency of the light remains the same when it enters a different medium. Therefore, the frequency of the blue light in the glass remains at 7.0 x 10^14 Hz.
(c) The speed of light in a medium is given by the formula v = c/n, where v is the speed in the medium, c is the speed of light in vacuum (approximately 3.00 x 10^8 m/s), and n is the refractive index of the medium.
Substituting the values, we get v = (3.00 x 10^8 m/s) / 1.50 = 2.00 x 10^8 m/s. Therefore, the speed of the blue light in the glass is approximately 2.00 x 10^8 m/s.
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Find the capacitance of the capacitor in a series LC-circuit if
the inductance of the inductor is = 3.20 H and the resonant
frequency of the circuit is = 1.40 × 104 /s.
The capacitance of the capacitor in a series LC-circuit if the inductance of the inductor is = 3.20 H and the resonant frequency of the circuit is = 1.40 × 10^4 /s is 7.42 × 10⁻¹² F.
We are given the following values:
Inductance of the inductor,L = 3.20 H
Resonant frequency of the circuit,fr = 1.40 × 10^4 /s.
We know that the resonant frequency of an LC circuit is given by;
fr = 1/2π√(LC)
Where C is the capacitance of the capacitor.
Let's substitute the given values in the above formula and find C.
fr = 1/2π√(LC)
Squaring both sides we get;
f²r = 1/(4π²LC)
Lets solve for C;
C = 1/(4π²L(f²r))
Substitute the given values in the above formula and solve for C.
C = 1/(4 × π² × 3.20 H × (1.40 × 10^4 /s)²)
The value of C comes out to be 7.42 × 10⁻¹² F.
Therefore, the capacitance of the capacitor in a series LC-circuit if the inductance of the inductor is = 3.20 H and the resonant frequency of the circuit is = 1.40 × 10^4 /s is 7.42 × 10⁻¹² F.
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Compressed air in a piston-cylinder with an initial volume of 8 litres expands causing the pressure to decrease from 902 kPa to 179 kPa. The initial temperature is 350 K and the index of expansion is n = 1.18. Find the heat transfer during this process. Give your answer in J to the nearest whole number.
The heat transfer during this process is 529 J to the nearest whole number. The formula for work done by the gas during expansion is given by,where, n = the index of expansion of the gas. P1 and V1 are the initial pressure and volume of the gas respectively.
P2 and V2 are the final pressure and volume of the gas respectively.The work done by the gas during expansion is equal to the heat transferred during the process. We can calculate the work done by the gas using the formula given above and then use the first law of thermodynamics to calculate the heat transferred during the process. The first law of thermodynamics is given by,Q = ΔU + W where, ΔU is the change in internal energy of the gas and W is the work done by the gas.
For an ideal gas, ΔU is given by,ΔU = (nR/(n-1))(T2 - T1) where, R is the gas constant and T1 and T2 are the initial and final temperatures of the gas respectively.Using the given values in the formula for work done by the gas during expansion, we get,
W = P1V1([tex](P2/P1)^((n-1)/n) - 1)/(1-n)[/tex]
= 902*8*10^-3*[tex]((179/902)^((1.18-1)/1.18) - 1)/(1-1.18)[/tex]
= -231.64 J (Note that the work done by the gas is negative since the gas is expanding).Using the given values in the formula for ΔU, we get,
ΔU = (nR/(n-1))(T2 - T1)
= (1.18*8.314)/(1.18-1)*(179-350)
= 761.17 J
Therefore, using the first law of thermodynamics, we get,Q = ΔU + W = 761.17 - 231.64
= 529 J (to the nearest whole number). Therefore, the heat transfer during this process is 529 J to the nearest whole number.
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A 0.030kg toy car is pushed back against a spring-based launcher. The spring constant of the spring is 222 N/m. The spring compresses 0.090m. The total distance the car travels is 2.509m.
1. a. Determine the velocity of the car once it leaves the spring.
b. Assuming no energy is lost to friction, the car now travels up a ramp that is angled at 40.0oabove the horizontal. Determine the distance the car travels up the ramp.
c. Friction now acts along the flat surface only (μ=0.200). Determine the new height of that the car reaches.
The velocity of the car, once it leaves the spring, is approximately 9.53 m/s. The distance the car travels up the ramp is approximately 4.63 meters. Accounting for friction along the flat surface, the new height that the car reaches is approximately 3.09 meters.
a. To determine the velocity of the car once it leaves the spring, we can use the principle of conservation of mechanical energy. The potential energy stored in the compressed spring is converted into kinetic energy when the car is released.
The potential energy stored in the spring can be calculated using the formula:
Potential energy = (1/2) * k * x^2
where k is the spring constant and x is the compression distance. Plugging in the values, we have:
Potential energy = (1/2) * 222 N/m * (0.090 m)^2
Potential energy = 0.9102 J
Since there is no energy lost to friction, this potential energy is converted entirely into kinetic energy:
Kinetic energy = Potential energy
(1/2) * m * v^2 = 0.9102 J
Rearranging the equation and solving for v, we get:
v = √((2 * 0.9102 J) / 0.030 kg)
v ≈ 9.53 m/s
Therefore, the velocity of the car, once it leaves the spring, is approximately 9.53 m/s.
b. When the car travels up the ramp, its initial kinetic energy is given by the velocity calculated in part (a). As the car moves up the ramp, some of its kinetic energy is converted into gravitational potential energy.
The change in height of the car can be calculated using the formula:
Change in height = (Initial kinetic energy - Final kinetic energy) / (m * g)
The initial kinetic energy is (1/2) * m * v^2, and the final kinetic energy can be calculated using the formula:
Final kinetic energy = (1/2) * m * v_final^2
Since the car is traveling up the ramp, its final velocity is zero at the highest point. Plugging in the values, we have:
Change in height = [(1/2) * m * v^2 - (1/2) * m * 0^2] / (m * g)
Change in height = v^2 / (2 * g)
Substituting the values, we get:
Change in height = (9.53 m/s)^2 / (2 * 9.8 m/s^2)
Change in height ≈ 4.63 m
Therefore, the distance the car travels up the ramp is approximately 4.63 meters.
c. When friction acts along the flat surface, it opposes the motion of the car. The work done by friction can be calculated using the formula:
Work done by friction = frictional force * distance
The frictional force can be calculated using the formula:
Frictional force = coefficient of friction * normal force
The normal force is equal to the weight of the car, which is given by:
Normal force = m * g
Substituting the values, we have:
Normal force = 0.030 kg * 9.8 m/s^2
Normal force = 0.294 N
The frictional force can be calculated as:
Frictional force = 0.200 * 0.294 N
Frictional force ≈ 0.059 N
Since the distance the car travels on the flat surface is given as 2.509 m, we can calculate the work done by friction:
Work done by friction = 0.059 N * 2.509 m
Work done by friction ≈ 0.148 J
The work done by friction is equal to the loss in mechanical energy of the car. This loss in mechanical energy is equal to the decrease in gravitational potential energy:
Loss in mechanical energy = m * g * (initial height - final height)
Rearranging the equation, we get:
Final height = initial height - (Loss in mechanical energy) / (m * g)
The initial height is the change in height calculated in part (b), which is 4.63 m. Substituting the values, we have:
Final height = 4.63 m - (0.148 J) / (0.030 kg * 9.8 m/s^2)
Final height ≈ 3.09 m
Therefore, the new height that the car reaches, accounting for friction, is approximately 3.09 meters.
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Review. A small object with mass 4.00kg moves counterclockwise with constant angular speed 1.50rad/s in a circle of radius 3.00m centered at the origin. It starts at the point with position vector 3.00 i^m . It then undergoes an angular displacement of 9.00 rad.(d) In what direction is it moving?
The object is moving counterclockwise along an arc of length 27.00m.
The small object with a mass of 4.00kg moves counterclockwise in a circle with a radius of 3.00m and a constant angular speed of 1.50rad/s. It starts at the point with a position vector of 3.00i^m.
To determine the direction in which the object is moving, we need to consider the angular displacement of 9.00rad. Angular displacement is the change in angle as an object moves along a circular path. In this case, the object moves counterclockwise, so the direction of the angular displacement is also counterclockwise.
To find the direction in which the object is moving, we can look at the change in the position vector. The position vector starts at 3.00i^m and undergoes an angular displacement of 9.00rad. This means that the object moves along an arc of the circle.
The direction of the object's motion can be determined by finding the vector that points from the initial position to the final position. Since the object moves counterclockwise, the vector should also point counterclockwise.
In this case, the magnitude of the angular displacement is 9.00rad, so the object moves along an arc of length equal to the radius multiplied by the angular displacement. The length of the arc is 3.00m * 9.00rad = 27.00m.
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What is the position of the 2nd maxima for a double slit experiment with a slit width of d=20mm, if there is a laser of 500nm, with the screen 1m away from the slits?
The position of the second maximum (second-order maximum) in this double-slit experiment would be 0.05 mm.
How to find the the position of the second maximum (second-order maximum) in this double-slit experimentTo find the position of the second maximum (second-order maximum) in a double-slit experiment, we can use the formula for the position of the maxima:
[tex]\[ y = \frac{m \cdot \lambda \cdot L}{d} \][/tex]
Where:
- [tex]\( y \) is the position of the maxima[/tex]
- [tex]\( m \) is the order of the maxima (in this case, the second maximum has \( m = 2 \))[/tex]
-[tex]\( \lambda \) is the wavelength of the laser light (500 nm or \( 500 \times 10^{-9} \) m)[/tex]
-[tex]\( L \) is the distance from the slits to the screen (1 m)[/tex]
- [tex]\( d \) is the slit width (20 mm or \( 20 \times 10^{-3} \) m)[/tex]
Substituting the given values into the formula:
[tex]\[ y = \frac{2 \cdot 500 \times 10^{-9} \cdot 1}{20 \times 10^{-3}} \][/tex]
Simplifying the expression:
[tex]\[ y = \frac{2 \cdot 500 \times 10^{-9}}{20 \times 10^{-3}} \][/tex]
[tex]\[ y = 0.05 \times 10^{-3} \][/tex]
[tex]\[ y = 0.05 \, \text{mm} \][/tex]
Therefore, the position of the second maximum (second-order maximum) in this double-slit experiment would be 0.05 mm.
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(a) A teaching assistant is preparing for an in-class demonstration, using insulated copper wire and a power supply. She winds a single layer of the wire on a tube with diameter of - 10.0 cm. The resulting solenoid ist 65.0 cm long, and the wire has a diameter of dare - 0.100 em Assume the insulation is very thin, and adjacent turns of the wire are in contact What power (in W) must be delivered to the solenoid it is to produce a field of 9.60 T at its center? (The resistivity of copper is 1.70 x 100m) XW What 117 Assume the maximum current the copper wire can safely carry is 320A (b) What is the maximum magnetic field (in) in the solenoid? Enter the magnitude) (c) What is the maximum power in W) delivered to the solenoid? w
The magnetic field produced by a solenoid can be expressed as B = µ₀nI, where B is the magnetic field, µ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current passing through the wire. We can also express the magnetic field as B = µ₀NI/L,
where N is the total number of turns, and L is the length of the solenoid. From these equations, we can find the number of turns per unit length of the solenoid as n = N/L. We can then calculate the resistance of the copper wire using the equation: R = ρL/A, where ρ is the resistivity of copper, L is the length of the wire, and A is the cross-sectional area of the wire. Finally, we can calculate the power delivered to the solenoid using the equation: P = IV,
where I is the current passing through the wire, and V is the voltage across the wire.
Given data: Length of the solenoid, L = 65 cm = 0.65 diameters of the tube, d = 10 cm Radius of the tube, r = d/2 = 5 cm = 0.05 diameter of the wire, d_wire = 0.1 cm = 0.001 m Resistivity of copper, ρ = 1.7 x 10-8 ΩmMaximum current, I_max = 320 A(a) Power delivered to the solenoid to produce a field of 9.60 T at its centre:
This gives n_max = d_wire/√(4r²+d_wire²)= 0.001/√(4*0.05²+0.001²)= 159 turns/m The maximum current the copper wire can safely carry is I_max = 320 A. Thus, the maximum magnetic field that can be produced by the solenoid is: B_max = µ₀n_maxI_max= (4π x 10-7) (159) (320)= 0.0804 TThe maximum power that can be delivered to the solenoid is: P_max = I²_max R= I²_max ρL/A= (320)² (1.7 x 10-8) (0.65)/π(0.001/2)²= 46.6 W(b) The maximum magnetic field (in T) in the solenoid:
As we have already determined the maximum magnetic field that can be produced by the solenoid, is given as: B_max = 0.0804 T(c) The maximum power (in W) delivered to the solenoid: The maximum power that can be delivered to the solenoid is given as: P_max = 46.6 W.
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What is the electric potential at a point midway between two
charges, -7.5 microC and -2.52 microC, separated by 11.45 cm?
the electric potential at the point midway between the -7.5 microC and -2.52 microC charges, separated by 11.45 cm, is approximately -1.595 × 10^6 volts.
To calculate the electric potential at the point midway between the charges, we can use the equation V = kQ/r, where V is the electric potential, k is the electrostatic constant (k ≈ 9 × 10^9 N m²/C²), Q is the charge, and r is the distance.
For the first charge, -7.5 microC (microCoulombs), the distance (r) is 5.725 cm (0.05725 m). Plugging these values into the equation, we have:
V1 = (9 × 10^9 N m²/C²) * (-7.5 × 10^(-6) C) / (0.05725 m)
Calculating this, we find:
V1 ≈ -1.176 × 10^6 V
For the second charge, -2.52 microC, the distance (r) is the same, 5.725 cm (0.05725 m). Plugging these values into the equation, we have:
V2 = (9 × 10^9 N m²/C²) * (-2.52 × 10^(-6) C) / (0.05725 m)
Calculating this, we find:
V2 ≈ -419,130 V
Finally, to find the electric potential at the midpoint, we sum the individual potentials:
V_total = V1 + V2
V_total ≈ -1.176 × 10^6 V + (-419,130 V)
V_total ≈ -1.595 × 10^6 V.
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Find the electric potential difference (VB - V. due to point charge in volts for 11 nC between two points А and B at distances 22.2 and 27.5 cm away respectively from the charge on a straight line in the same direction 85.945
The electric potential difference ([tex]V_B - V_A[/tex]) due to point charge in volts for 11 nC between two points А and B at distances 22.2 and 27.5 cm away respectively from the charge on a straight line in the same direction is 26.90 volts.
To find the electric potential difference ([tex]V_B - V_A[/tex]) due to a point charge between points A and B, we can use the formula:
ΔV = [tex]V_B - V_A[/tex] = k * (Q / [tex]r_B[/tex] - Q / [tex]r_A[/tex])
Where:
ΔV is the electric potential difference
[tex]V_B[/tex] and [tex]V_A[/tex] are the electric potentials at points B and A respectively
k is the Coulomb's constant (8.99 x 10⁹ N m²/C²)
Q is the charge of the point charge (11 nC = 11 x 10⁻⁹ C)
[tex]r_B[/tex] and [tex]r_A[/tex] are the distances from the charge to points B and A respectively
Given:
[tex]r_B[/tex] = 27.5 cm = 0.275 m
[tex]r_A[/tex] = 22.2 cm = 0.222 m
Q = 11 nC = 11 x 10⁻⁹ C
Plugging these values into the formula, we get:
ΔV = (8.99 x 10⁹ N m²/C²) * ((11 x 10⁻⁹ C) / (0.275 m) - (11 x 10⁻⁹ C) / (0.222 m))
Calculating this expression gives:
ΔV = 26.90 volts
Therefore, the electric potential difference ([tex]V_B - V_A[/tex]) between points A and B, due to the point charge, is 26.90 volts.
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The electric potential difference (VB - V) between points A and B, due to the point charge, is -1.24 × 10^5 V/m or 124,000 V/m.
To find the electric potential difference between points A and B, we can use the formula V = k(q/r), where V is the electric potential difference, k is Coulomb's constant (9 × 10^9 Nm^2/C^2), q is the charge (11 × 10^-9 C), and r is the distance between the charge and points A or B.
Given:
Distance between the charge and point A (r_A) = 0.222 mDistance between the charge and point B (r_B) = 0.275 mUsing the formula, we can calculate the electric potential difference at points A and B:
At point A:
V_A = k(q/r_A)
V_A = (9 × 10^9 Nm^2/C^2) × (11 × 10^-9 C) / 0.222 m
V_A = 4.44 × 10^5 V/m
At point B:
V_B = k(q/r_B)
V_B = (9 × 10^9 Nm^2/C^2) × (11 × 10^-9 C) / 0.275 m
V_B = 3.20 × 10^5 V/m
The electric potential difference between points A and B can be found by taking the difference between V_B and V_A:
V_B - V_A = 3.20 × 10^5 V/m - 4.44 × 10^5 V/m
V_B - V_A = -1.24 × 10^5 V/m
Therefore, the electric potential difference (VB - V) between points A and B, due to the point charge, is -1.24 × 10^5 V/m or 124,000 V/m.
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Calculate the maximum height to which water could be squirted with the hose if it emerges from
the nozzle at 16.3 m/s.
The maximum height to which water could be squirted is approximately 13.66 meters.
To calculate the maximum height to which water could be squirted with the hose, we can use the principles of projectile motion.
Given:
Initial velocity (v₀) = 16.3 m/s
Gravitational acceleration (g) = 9.8 m/s² (approximate value)
The following equation can be solved to find the maximum height:
h = (v₀²) / (2g)
Substituting the given values:
h = (16.3 m/s)² / (2 × 9.8 m/s²)
h = 267.67 m²/s² / 19.6 m/s²
h ≈ 13.66 meters
Therefore, for the water squirted by the hose, the maximum height is approximately 13.66 meters.
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3. (1 p) In Figure 2, a conductive rod of length 1.2 m moves on two horizontal rails, without friction, in a magnetic field of 2.5 T. If the total resistance of the circuit is 6.0 2 how fast must the rod move to generate a current of 0.50 A?
The rod must move at a velocity of 1.0 m/s to generate a current of 0.50 A in the circuit.
How to calculate the velocityThe EMF generated in the circuit is equal to the potential difference across the total resistance of the circuit:
EMF = I * R,
In this case, we know that the EMF is equal to the potential difference across the total resistance, so we can equate the two equations:
B * v * L = I * R.
Plugging in the known values:
B = 2.5 T (tesla),
L = 1.2 m (meters),
I = 0.50 A (amperes),
R = 6.0 Ω (ohms),
we can solve for v (velocity):
2.5 T * v * 1.2 m = 0.50 A * 6.0 Ω.
Simplifying the equation:
3.0 T * v = 3.0 A * Ω,
v = (3.0 A * Ω) / (3.0 T).
The units of amperes and ohms cancel out, leaving us with meters per second (m/s):
v = 1.0 m/s.
Therefore, the rod must move at a velocity of 1.0 m/s to generate a current of 0.50 A in the circuit.
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An infinitely long straight wire is along the x axis. A current I = 2.00 A flows in the + x
direction.
Consider a position P whose coordinate is (2, y, 2) = (2.00cm, 5.00cm, 0) near the
wire. What is the small contribution to the magnetic feld dB at P due to just a small segment
of the current carrying wire of length da at the origin?
The small contribution to the magnetic feld dB at P due to just a small segment of the current carrying wire of length da at the origin is (2 × 10⁻⁷ T)(da).
The magnetic field dB at point P due to just a small segment of the current-carrying wire of length da at the origin can be given by:
dB = μI/4π[(da)r]/r³ Where,
dB is the small contribution to the magnetic field,
I is the current through the wire,
da is the small segment of the wire,
μ is the magnetic constant, and
r is the distance between the segment of the wire and point P.
Given that, I = 2.00 A, μ = 4π × 10⁻⁷ T m/A,
r = (2² + 5² + 2²)¹/² = 5.39 cm = 5.39 × 10⁻² m.
The distance between the segment of the wire and point P can be obtained as follows:
r² = (2 - x)² + y² + 4r² = (2 - 2.00)² + (5.00)² + 4r = 5.39 × 10⁻² m
Thus, r = 5.39 × 10⁻² m.
Substituting the above values in the formula for dB we have,
dB = μI/4π[(da)r]/r³
dB = (4π × 10⁻⁷ T m/A)(2.00 A)/4π[(da)(5.39 × 10⁻² m)]/(5.39 × 10⁻² m)³
dB = (2 × 10⁻⁷ T)(da)
The small contribution to the magnetic field at point P due to the small segment of the current carrying wire of length da at the origin is (2 × 10⁻⁷ T)(da).
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( a) ) An object of height 2.0 cm is placed 3.0 cm in front of a concave mirror. If the height of image is 5.0 cm and virtual image is formed, (i) sketch and label a ray diagram to show the formation of the image. (ii) calculate the focal length of the mirror. (b) A convex mirror has a focal length of 8.0 cm. If the image is virtual and the image distance is one third of the object distance, calculate the (i) object distance. magnification of the image. (c) a The image of a 20 cents coin has twice the diameter when a convex lens is placed 2.84 cm from it. Calculate the focal length of the lens.
The focal length of the mirror is 0.300cm. The object distance d(object) is 10.67 cm. The magnification of the image is approximately -3. The focal length of the convex lens is 2.84 cm.
a), (ii) Calculating the focal length of the mirror:
Given:
Height of the object h(object) = 2.0 cm
Height of the image h(image) = 5.0 cm
magnification (m) = h(image) / h(object)
m = 5.0 cm / 2.0 cm = 2.5
m = -d(image) / d(object)
m = -(-3.0) / d(object)
2.5 = 3.0 / d(object)
d(object) = 1.2 cm
The object distance d(object) is 1.2 cm.
Image distance d(image) = (1/3) * object distance d(object) = 0.4cm
1/f = 1/d(object) + 1/d(image)
1/f = 0.83 + 2.5
f = 0.300cm
The focal length of the mirror is 0.300cm.
(b) Calculating the object distance and magnification:
Given:
Focal length of the convex mirror (f) = 8.0 cm
Image distance d(image) = (1/3) * object distance d(object)
1/f = 1/d(object) + 1/d(image)
1/8.0 = (1 + 3) / (3 * d(object))
d(object) = 10.67 cm
The object distance d(object) is 10.67 cm.
To calculate the magnification (m):
1/f = 1/(object)+ 1/d(image)
1/8.0 = 1/10.67 + 1/d(image)
0.125 - 0.09375= 1/d(image)
0.03125 cm = 1/d(image)
d(image) = 32 cm
The image distance d(image) is 32 cm.
m = -d(image) / d(object)
m = -32 / 10.67
m = -3
Therefore, the magnification of the image is approximately -3.
(c) Calculating the focal length of the convex lens:
Given:
Diameter of the image d(image) = 2 * diameter of the coin
Distance between the lens and the coin (d) = 2.84 cm
1/f = 1/d(object)+ 1/d(image)
1/f = 1/d + 1/d
2/f = 2/d
d = f
Therefore, the distance between the lens and the object is equal to the focal length of the lens.
Substituting the given values:
2.84 cm = f
The focal length of the convex lens is 2.84 cm.
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A ray from a red laser beam is shined on a block of amber with a thickness of t=15cm and na = 1.55. the block is partially submerged in oil (n0 = 1.48) . The top part of the block is in open air
a) Calculate the polarization or Brewster angle for both interfaces (air-amber and amber-oil)
b)Which interface will a critical angle be formed on and what is the critical angle.
c)Assume the angle of incidence is θI = 48 ⁰. Calculate the transit time for the light to go from a point p that is h1=18cm above the top of the block and q that is h2=12cm below the submerged bottom side of the block
a) The Brewster’s angle for both interfaces is 57.2° and 46.3° respectively. b) amber oil interface will serve the critical angle. c) The transit time is calculated to be 2.46 × 10⁻⁹ s.
Brewster’s angle is also referred to as the polarization angle. It is the angle at which a non-polarised EM wave (with equal parts vertical and horizontal polarization)
a) For air-amber pair,
μ = nₐ/n
μ = 1.55
brewster angle
θair amber = tan⁻¹(1.55)
= 57.2°
ii) For amber oil pair
μ = nₐ/n₀ = 1.55/ 1.48
= 1.047
Brewster angle θ oil amber = tan⁻¹ (1.047)
= 46.3°
b) The interface amber oil will serve for critical angle and
θc = sin⁻¹ = 1.48/1.55 = 72.7°
c) As θ₁ = 48°, na = sinθ₁ /sin θ₂
θ₂ = sin⁻¹(sinθ₁/na)
= sin⁻¹ ( sin 48/1.55)
= 28.65°
Now sinθ₂/sinθ₃ = 1.48/1.55
sinθ₃ = 1.48/1.55 × sin(28.65)
θ₃ = 30
The time taken to reach p to q
= 1/c [n₁/sinθ + t × nₐ/ sin θ₂ +n₂× n₀/sin θ3
= 2.46 × 10⁻⁹ s.
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A car races in a circular track of radius r = 136 meters. What
is the average velocity (in m/s) after half a lap, if it completes
a lap in 13 seconds? Round to the nearest tenth. (You do not need
to t
The average velocity of the car after half a lap if it completes a lap in 13 seconds is approximately 14.1 m/s.
To find the average velocity of the car after half a lap, we need to determine the distance traveled and the time taken.
Radius of the circular track (r) = 136 meters
Time taken to complete a lap (t) = 13 seconds
The distance traveled in half a lap is equal to half the circumference of the circle:
Distance = (1/2) × 2π × r
Distance = π × r
Plugging in the value of the radius:
Distance = π × 136 meters
The average velocity is calculated by dividing the distance traveled by the time taken:
Average velocity = Distance / Time
Average velocity = (π × 136 meters) / 13 seconds
Average velocity = 14.1 m/s
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Light reflected from a horizontal surface, such as a road or a lake, has a partial horizontal polarization. We can think of the light as a mixture of horizontally polarized light and unpolarized light. Suppose the reflected light from a road surface is 50% polarized and 50% unpolarized. The light intensity is 160 W/m² Part A What is the intensity after the light passes through a polarizing filter whose axis makes an angle from the horizontal of 07 Express your answer with the appropriate units
The intensity of the light after passing through the polarizing filter with an axis making an angle of 07 degrees from the horizontal is approximately 155 W/m².
When light passes through a polarizing filter, the intensity of the transmitted light is given by Malus's law:
I = I₀ * cos²(θ)
Where:
I₀ = initial intensity of the light
θ = angle between the polarization axis of the filter and the direction of polarization of the incident light
I = intensity of the transmitted light
Given:
Initial intensity (I₀) = 160 W/m²
Angle (θ) = 07 degrees
Converting the angle to radians:
θ = 07 degrees * (π/180) ≈ 0.122 radians
Applying Malus's law:
I = I₀ * cos²(θ)
I = 160 W/m² * cos²(0.122)
Calculating the intensity:
I ≈ 160 W/m² * cos²(0.122)
I ≈ 160 W/m² * 0.973
Expressing the intensity with the appropriate units:
I ≈ 155 W/m²
Therefore, the intensity of the light after passing through the polarizing filter with an axis making an angle of 07 degrees from the horizontal is approximately 155 W/m².
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For a drum dryer consider the following data: Steam temperature = 150C, vaporization temperature of milk 100C, overall heat transfer coefficient 1.2kw/m2-k, Drum diameter= 70cm, Length of drum = 120 cm, latent heat of vaporization = 2261kJ/kg. The product is scraped at 3/4 of a revolution of the drum. Assum that there are no heat losses to the surroundings.
A. available heat transfer area in m2
B. Evaporation rate in kg/hr
C. If evaporation rate is increased by 50% by howmuch should the length of the drum be increase?
A. The available heat transfer area in m² for the drum dryer is 1.8 m².
B. The evaporation rate in kg/hr for the drum dryer is 15.7 kg/hr.
C. To increase the evaporation rate by 50%, the length of the drum should be increased by 80 cm.
For the first part, to determine the available heat transfer area, we need to calculate the surface area of the drum. The drum can be approximated as a cylinder, so we can use the formula for the lateral surface area of a cylinder: A = 2πrh. Given that the drum diameter is 70 cm, the radius is half of the diameter, which is 35 cm or 0.35 m. The height of the drum is given as 120 cm or 1.2 m. Substituting these values into the formula, we get A = 2π(0.35)(1.2) ≈ 2.1 m². However, only 3/4 of the drum revolution is used for scraping the product, so the available heat transfer area is 3/4 of 2.1 m², which is approximately 1.8 m².
For the second part, the evaporation rate can be calculated using the equation Q = UAΔT/λ, where Q is the heat transfer rate, U is the overall heat transfer coefficient, A is the available heat transfer area, ΔT is the temperature difference, and λ is the latent heat of vaporization. The temperature difference is the steam temperature (150°C) minus the vaporization temperature of milk (100°C), which is 50°C or 50 K. Substituting the given values into the equation, we have Q = (1.2)(1.8)(50)/(2261×10³) ≈ 15.7 kg/hr.
For the third part, we need to increase the evaporation rate by 50%. To achieve this, we can use the same equation as before but with the increased evaporation rate. Let's call the new evaporation rate E'. Since the evaporation rate is directly proportional to the available heat transfer area, we can write E'/E = A'/A, where A' is the new heat transfer area. We need to solve for A' and then find the corresponding length of the drum. Rearranging the equation, we have A' = (E'/E) × A. Given that E' = 1.5E (increased by 50%), we can substitute the values into the equation: A' = (1.5)(1.8) ≈ 2.7 m². Now, we can use the formula for the surface area of a cylinder to find the new length: 2.7 = 2π(0.35)(L'), where L' is the new length of the drum. Solving for L', we get L' ≈ 1.8 m. The increase in length is L' - L = 1.8 - 1.2 ≈ 0.6 m or 60 cm.
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An EM wave of E=200 N/C with a frequency of 500Hz, what is the magnitude of B field and calculate the time period and wave length.
The magnitude of the magnetic field associated with an electromagnetic wave with an electric field amplitude of 200 N/C and a frequency of 500 Hz is approximately 6.67 × 10^-7 T. The time period of the wave is 0.002 s and the wavelength is 600 km.
The magnitude of the magnetic field (B) associated with an electromagnetic wave can be calculated using the formula:
B = E/c
where E is the electric field amplitude and c is the speed of light in vacuum.
B = 200 N/C / 3x10^8 m/s
B = 6.67 × 10^-7 T
Therefore, the magnitude of the magnetic field is approximately 6.67 × 10^-7 T.
The time period (T) of an electromagnetic wave can be calculated using the formula:
T = 1/f
where f is the frequency of the wave.
T = 1/500 Hz
T = 0.002 s
Therefore, the time period of the wave is 0.002 s.
The wavelength (λ) of an electromagnetic wave can be calculated using the formula:
λ = c/f
λ = 3x10^8 m/s / 500 Hz
λ = 600,000 m
Therefore, the wavelength of the wave is 600,000 m or 600 km.
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17) The SI units for impulse may be written as: A) kgm²/s² B) kgm/s C) kgm²/s D) kgm/s² 18) The physical quantity that can have the same unit as impulse is: A) force B) work C) power D) momentum 1
The answers are:
17) A) kgm²/s²
18) D) momentum
17) The SI unit for impulse is written as kgm²/s². Impulse is defined as the product of force and time, and its unit is derived from the units of force (kgm/s²) and time (s). Therefore, the SI unit for impulse is kgm²/s².
18) The physical quantity that can have the same unit as impulse is momentum. Momentum is the product of mass and velocity, and its unit is derived from the units of mass (kg) and velocity (m/s). The unit for momentum is kgm/s, which is the same as the unit for impulse (kgm/s).
Impulse and momentum are closely related concepts in physics. Impulse is the change in momentum of an object and is equal to the product of force and time. Momentum is the quantity of motion possessed by an object and is equal to the product of mass and velocity. Both impulse and momentum involve the multiplication of mass and velocity, resulting in the same unit.
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Tina is looking out a window and throws a marble straight downward toward the sidewalk below at a speed of 5.67 m/s . The window is 35.0 m above the sidewalk. Answer the two parts below, using three sig figs. Part A - What is the speed of the ball, vf, when it hits the ground? I got 26.8 Part B - After 1.58 s1.58 s, how far down, Δy, has the marble traveled? I got 21.2 Please provide steps + answer
The speed of the ball when it hits the ground is 26.8 m/s, and after 1.58 seconds, the marble has traveled a distance of 21.2 meters downward.
To find the speed of the ball, vf, when it hits the ground, we can use the equation for free-fall motion. The initial velocity, vi, is 5.67 m/s (given) and the acceleration due to gravity, g, is approximately 9.8 m/s².
We can assume the ball is thrown straight downward, so the final velocity can be calculated using the equation vf = vi + gt. Substituting the values, we get vf = 5.67 m/s + (9.8 m/s²)(t).
As the ball reaches the ground, the time, t, it takes to fall is the total time it takes to travel 35.0 m. Therefore, t = √(2d/g) where d is the distance and g is the acceleration due to gravity.
Plugging in the values, t = √(2 * 35.0 m / 9.8 m/s²) ≈ 2.10 s. Now, we can substitute this value back into the equation for vf to find vf = 5.67 m/s + (9.8 m/s²)(2.10 s) ≈ 26.8 m/s.
To determine how far down, Δy, the marble has traveled after 1.58 seconds, we can use the equation for displacement in free-fall motion. The formula is Δy = vi * t + (1/2) * g * t², where Δy is the displacement, vi is the initial velocity, t is the time, and g is the acceleration due to gravity.
Plugging in the values, Δy = (5.67 m/s) * (1.58 s) + (1/2) * (9.8 m/s²) * (1.58 s)² ≈ 21.2 meters. Therefore, after 1.58 seconds, the marble has traveled approximately 21.2 meters downward.
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Light travels down a light pipe made of flint glass having index of refraction 1.82 coated on the outside by borosilicate crown glass with index 1.53 . What is the critical angle for total internal reflection inside the light pipe? Answer in units of ◦ .
The critical angle for total internal reflection in the light pipe is approximately 50.12°, calculated using Snell's Law and the refractive indices of the two materials involved.
Snell's Law is given by:
n₁ * sin(Ф₁) = n₂ * sin(Ф₂)
where:
n₁ is the refractive index of the medium of incidence (flint glass)
n₂ is the refractive index of the medium of refraction (borosilicate crown glass)
Ф₁ is the angle of incidence
Ф₂ is the angle of refraction
In this case, we want to find the critical angle, which means Ф₂ = 90°. We can rearrange Snell's Law to solve for theta1:
sin(Ф₁) = (n₂ / n₁) * sin(Ф₂)
Since sin(90°) = 1, the equation becomes:
sin(Ф₁) = (n₂ / n₁) * 1
Taking the inverse sine (arcsin) of both sides gives us:
Ф₁ = arcsin(n₂ / n₁)
Substituting the given refractive indices, we have:
Ф₁ = arcsin(1.53 / 1.82)
Using a scientific calculator or math software, we can evaluate the arcsin function:
Ф₁ ≈ 50.12°
Therefore, the critical angle for total internal reflection inside the light pipe is approximately 50.12°.
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What is the impedance of a 1.12 k2 resistor, a 145 mH inductor, and a 20.8 μF capacitor connected in series with a 55.0 Hz ac generator? IVD ΑΣΦ Z= S2 Submit Request Answer
To calculate the impedance of a series combination of a resistor, inductor, and capacitor connected to an AC generator, we use the formula Z = √(R^2 + (XL - XC)^2), where R is the resistance, XL is the inductive reactance, and XC is the capacitive reactance. Given the values of the resistor, inductor, and capacitor, and the frequency of the AC generator, we can calculate the impedance.
The impedance of a series combination of a resistor, inductor, and capacitor is the total opposition to the flow of alternating current. In this case, we have a 1.12 kΩ resistor, a 145 mH inductor, and a 20.8 μF capacitor connected in series with a 55.0 Hz AC generator.
First, we need to calculate the inductive reactance (XL) and capacitive reactance (XC). The inductive reactance is given by XL = 2πfL, where f is the frequency and L is the inductance. Similarly, the capacitive reactance is given by XC = 1/(2πfC), where C is the capacitance.
XL = 2πfL = 2π(55.0 Hz)(145 mH) = 2π(55.0)(0.145) Ω
XC = 1/(2πfC) = 1/(2π(55.0 Hz)(20.8 μF)) = 1/(2π(55.0)(20.8e-6)) Ω
Now, we can calculate the impedance using the formula Z = √(R^2 + (XL - XC)^2):
Z = √((1.12 kΩ)^2 + ((2π(55.0)(0.145) Ω) - (1/(2π(55.0)(20.8e-6)) Ω))^2)
Simplifying this expression will give us the final answer for the impedance.
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A circular capacitor of radius ro = 5.0 cm and plate spacing d = 1.0 mm is being charged by a 9.0 V battery through a R = 10 Ω resistor. At which distance r from the center of the capacitor is the magnetic field strongest (in cm)?
The circular capacitor of radius ro = 5.0 cm and plate spacing d = 1.0 mm is being charged by a 9.0 V battery through a R = 10 Ω resistor. We are to determine the distance r from the center of the capacitor at which the magnetic field is strongest. By given information, we can determine that the magnetic field is strongest at a distance of r = 20 cm from the center of the capacitor.
The magnetic force is given by the formula
F = qvBsinθ
where,
q is the charge.
v is the velocity of the particle.
B is the magnetic field
θ is the angle between the velocity vector and the magnetic field vector. Since there is no current in the circuit, no magnetic field is produced by the capacitor. Therefore, the magnetic field is zero. The strongest electric field is at the center of the capacitor because it is equidistant from both plates. The electric field can be given as E = V/d
where V is the voltage and d is the separation distance between the plates.
Therefore, we have
E = 9/0.001 = 9000 V/m.
At the center of the capacitor, the electric field is given by
E = σ/2ε0, where σ is the surface charge density and ε0 is the permittivity of free space.
Therefore,
σ = 2ε0E = 2 × 8.85 × 10^-12 × 9000 = 1.59 × 10^-7 C/m^2.
At a distance r from the center of the capacitor, the surface charge density is given by
σ = Q/(2πrL), where Q is the charge on each plate, and L is the length of the plates.
Therefore, Q = σ × 2πrL = σπr^2L.
We can now find the capacitance C of the capacitor using C = Q/V.
Hence,
C = σπr^2L/V.
Substituting for V and simplifying, we obtain
C = σπr^2L/(IR) = 2.81 × 10^-13πr^2.Where I is the current in the circuit, which is given by I = V/R = 0.9 A.
The magnetic field B is given by B = μ0IR/2πr, where μ0 is the permeability of free space.
Substituting for I and simplifying, we get
B = 2.5 × 10^-5/r tesla.
At a distance of r = 20 cm from the center of the capacitor, the magnetic field is strongest. Therefore, the magnetic field is strongest at a distance of r = 20 cm from the center of the capacitor.
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Consider the combination of resistors shown in figure. If a
voltage of 49.07 V is applied between points a and b, what is the
current in the 6.00 Ω resistor?
Using Ohm's law, we know that V = IR where V is voltage, I is current, and R is resistance.
In this problem, we are given the voltage and resistance of the resistor. So we can use the formula to calculate the current:
I = V/R So,
we can calculate the current in the 6.00 Ω resistor by dividing the voltage of 49.07 V by the resistance of 6.00 Ω.
I = 49.07 V / 6.00 ΩI = 8.18 A.
The current in the 6.00 Ω resistor is 8.18 A.
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A
10uC charge is at rest in a magnetic field of 5T pointing along the
+y-axis. what is the force acting on this charge in the magnetic
field
The force acting on the charge in the magnetic field is zero.
Charge (q) = +10uC = +10 × 10^-6C ;
Velocity (v) = 0 (Charge is at rest) ;
Magnetic field (B) = 5 T ;
Direction of Magnetic field (θ) = +y-axis.
Lorentz force acting on a charged particle is given as,
F = qvB sinθ
where, q is the charge of the particle,
v is the velocity of the particle,
B is the magnetic field, and
θ is the angle between the velocity vector and the magnetic field vector.
In this case, the particle is at rest, so the velocity of the particle is zero (v = 0). Also, the angle between the magnetic field vector and the velocity vector is 90°, since the magnetic field is pointing along the y-axis.
Therefore,θ = 90°The equation for the force acting on the charge in a magnetic field is:
F = qvB sinθ
As we know, the velocity of the charge is zero (v=0), therefore, the force acting on the charge in the magnetic field is:
F = 0 (As q, B and θ are all non-zero)
So, the force acting on the charge in the magnetic field is zero.
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Pushing down on a bicycle pedal with 663 N of force, the pedal fixed at 0.20 m from the center of the gear moves through 30° of angle. What is the work in newton-meters that you do to effect this motion?
The work done to effect the motion of the bicycle pedal is approximately 66.72 N·m (Newton-meters).
To calculate the work done in this scenario, we can use the formula for work done by a force applied at an angle.
Given:
Force applied (F) = 663 N
Distance from the center of the gear (r) = 0.20 m
Angle through which the pedal moves (θ) = 30°
The work done (W) can be calculated using the formula:
W = F * r * cos(θ)
First, we need to convert the angle from degrees to radians:
θ (in radians) = θ (in degrees) * (π / 180)
θ (in radians) = 30° * (π / 180) ≈ 0.5236 radians
Now we can calculate the work done:
W = 663 N * 0.20 m * cos(0.5236)
W ≈ 66.72 N·m
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The volume of a sphere is given by the equation =433, where is the radius. calculate the volume of a sphere with a radius of 131 pm in cubic meters.
The volume of a sphere is given by the equation V = (4/3)πr^3, where r is the radius. To calculate the volume of a sphere with a radius of 131 pm in cubic meters, we need to convert the radius from picometers to meters.
1 picometer (pm) = 1 x 10^-12 meters
So, the radius in meters would be:
131 pm = 131 x 10^-12 meters
Now we can substitute the radius into the volume equation:
V = (4/3)π(131 x 10^-12)^3
V = (4/3)π(2.1971 x 10^-30)
V ≈ 3.622 x 10^-30 cubic meters
Therefore, the volume of the sphere with a radius of 131 pm is approximately 3.622 x 10^-30 cubic meters.
Let me know if you need further assistance.
The formula for the volume of a sphere is V = (4/3)πr^3,
where V is the volume and r is the radius.
We then performed the necessary calculations to find the volume of the sphere, which turned out to be approximately 3.622 x 10^-30 cubic meters.
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Suppose the position of an object is given by r⃗ = (3.0t2i^ - 6.0t3j^)m. Where t in seconds.
Part A
Determine its velocity v⃗ as a function of time t.
Express your answer using two significant figures. Express your answer in terms of the unit vectors i^and j^.
Part B
Determine its acceleration a⃗ as a function of time t.
Part C
Determine r⃗ at time t = 2.5 s.
Express your answer using two significant figures. Express your answer in terms of the unit vectors i^and j^.
Part D
Determine v⃗ at time t = 2.5 s.
Part A: Velocity v⃗ as a function of time t is (6.0ti^ - 18.0t²j^) m/s
Part B: Acceleration a⃗ as a function of time t is (6.0i^ - 36.0tj^) m/s²
Part C: r⃗ at time t = 2.5 s is (-46.9i^ - 234.4j^) m
Part D: v⃗ at time t = 2.5 s is (37.5i^ - 225j^) m/s
The given position of the object is r⃗ = (3.0t²i^ - 6.0t³j^)m. We have to determine the velocity v⃗ as a function of time t, acceleration a⃗ as a function of time t, r⃗ at time t = 2.5 s, and v⃗ at time t = 2.5 s.
Part A: The velocity v⃗ is the time derivative of position r⃗.v⃗ = dr⃗ /dt
Differentiate each component of r⃗,v⃗ = (6.0ti^ - 18.0t²j^) m/s
Part B: The acceleration a⃗ is the time derivative of velocity v⃗.a⃗ = dv⃗/dt
Differentiate each component of v⃗,a⃗ = (6.0i^ - 36.0tj^) m/s²
Part C: We need to determine r⃗ at time t = 2.5 s.r⃗ = (3.0(2.5)²i^ - 6.0(2.5)³j^) m
r⃗ = (-46.9i^ - 234.4j^) m
Part D: We need to determine v⃗ at time t = 2.5 s.v⃗ = (6.0(2.5)i^ - 18.0(2.5)²j^) mv⃗ = (37.5i^ - 225j^) m/s
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A 3 kg cannon ball is loaded into a 200 kg cannon. When the
cannon is fired, it recoils at 6 m/s. What is the cannon ball’s
velocity after the explosion?
The cannonball's velocity after the explosion is 400 m/s.
To find the cannonball's velocity after the explosion, we can use the principle of conservation of momentum. According to this principle, the total momentum before the explosion is equal to the total momentum after the explosion.
The momentum of an object is calculated by multiplying its mass by its velocity.
Let's assume the initial velocity of the cannonball is v1, and the final velocity of the cannonball after the explosion is v2.
According to the conservation of momentum:
Initial momentum = Final momentum
(3 kg) * (v1) + (200 kg) * (0) = (3 kg) * (v2) + (200 kg) * (-6 m/s)
Since the cannon is initially at rest, the initial velocity of the cannonball (v1) is 0 m/s.
0 = 3v2 - 1200
Rearranging the equation, we find:
3v2 = 1200
v2 = 400 m/s
After the explosion, the cannonball will have a velocity of 400 m/s. This means it will move away from the cannon with a speed of 400 m/s.
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Firefox Problem 15 (5 Points) 30 loc a) How much heat is needed to raise the temperature of a 13.5 kg steel pot containing 5.0 kg of water from 30 °C to the boiling point and then to boil away 5.0 kg of the . water? Motel 5 stel (100-20) + minter .Sulater (100-30)+me: 13.5.420.130 +5.4186.120 +5.2260 X10 147580005 b) If heat is supplied to the pot of water at the rate of 120 cal/minutes, how long will this take?
The heat needed to raise the temperature of the steel pot containing water to the boiling point and then boil away the water is approximately 12,191,740 Joules.
It would take approximately 24,292 minutes or 405.5 hours to supply heat to the pot of water at a rate of 120 cal/minute.
a) To calculate the heat needed for each step, we use the formula
Q = m * c * ΔT
where,
Q is the heat
m is the mass
c is the specific heat capacity
ΔT is the change in temperature.
1. Heat to raise the temperature to the boiling point:
For the steel pot:
Q_pot = m_pot * c_pot * ΔT_pot
= 13.5 kg * 420 J/kg°C * (100°C - 20°C)
= 54,540 J
For the water:
Q_water = m_water * c_water * ΔT_water
= 5.0 kg * 4186 J/kg°C * (100°C - 30°C)
= 837,200 J
2. Heat to boil away the water:
Q_boiling = m_water * L
= 5.0 kg * 2260 kJ/kg
= 11,300,000 J
Total heat needed: Q_total = Q_pot + Q_water + Q_boiling
= 54,540 J + 837,200 J + 11,300,000 J
= 12,191,740 J
Therefore, the heat needed to raise the temperature of the steel pot containing water to the boiling point and then boil away the water is approximately 12,191,740 Joules.
b) To calculate the time required, we use the formula
Q = P * t, where
Q is the heat
P is the power
t is the time.
Given: P = 120 cal/min
= 120 cal/min * (4.186 J/cal) / (60 s/min)
≈ 8.372 J/s
Using the total heat needed from part a:
Q_total = P * t
12,191,740 J = 8.372 J/s * t
t ≈ 1,457,562 s ≈ 24,292 min ≈ 405.5 hours
Therefore, it would take approximately 24,292 minutes or 405.5 hours to supply heat to the pot of water at a rate of 120 cal/minute.
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