Answer:
All the elements except for the ones on the last column (at the left of the periodic table)
Explanation:
Daily variations in biological and psychological processes, such as blood pressure and the secretion of hormones, are called:
A. free-running conditions.
B. REM rebound effects.
C. circadian rhythms.
D. delta brain wave activity.
How Biological Rhythms Work
How Biological Rhythms WorkDiurnal (night and day)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)Circannual (1 year)
Find out which of the following sentences is a false statement. Group of answer choices The potential energy of a pair of positively charged bodies is positive. The potential energy of a pair of oppositely charged bodies is negative. The total work required to assemble a collection of discrete charges is the electrostatic potential energy of the system. The potential energy of a pair of negatively charged bodies is negative. The potential energy of a pair of oppositely charged bodies is positive.
The statements which are false from the choices above are:
The potential energy of a pair of negatively charged bodies is negativeThe potential energy of a pair of oppositely charged bodies is positiveIn scenarios of like charges, the potential energy is always positive, that is because we need to put energy in the system to bring like charges closer together.
Conversely, for unlike charges, the potential energy of the pair of unlike charges is negative, as a result of the energy expended by the system in pushing the charges away from each other.
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How many milliliters are in 3.2 L? (1000 mL = 1L)
Answer: 3200ml.
Please give brainliest.
Answer:
3200ml
Explanation:
[tex](3.2L)\frac{1000mL}{1L} = 3200mL[/tex]
A car parked on level pavement exerts a force of 10,000 newtons on the ground. What force does the pavement exert back on the car?
(F = ma, g = 9.81 m/s2)
A.2,500 newtons
B.10,000 newtons
C.10,000 kilograms
D.0 newtons
Answer:
B.
Explanation:
When equal forces are exerted onto eachother, they are exerting equal pressure since they are stationary.
in 10 minutes a heart can beat 700 times at this rate in how many minutes will a heart beat 140 times at what rate can a heart beat
Which statement is true?
A. Speed is a scalar quantity and velocity is a vector quantity.
B. Speed and velocity are both scalar quantities.
C. Speed and velocity are both vector quantities.
D. Speed is a vector quantity and velocity is a scalar quantity.
E. Speed and velocity are neither a scalar quantity nor a vector quantity.
Help! Especially from any PLATO users!
A ) Speed is a scalar quantity and velocity is a vector quantity.
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person’s eyes and the building is 85.5 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 38.9o with the horizontal. In part b the person is looking at the top of the antenna, and his line of sight makes an angle of 41.6o with the horizontal. How tall is the antenna?
Which of the following could be evidence that an organism's growth is influenced by the organismis genes?
(Hint identical twins have identical genes. Non-identical twins have about half the same genes.)
Adog breed can be made smaller by breeding together only the smallest dogs.
Identical twins are more likely to be about the same height than non-identical twins,
Chdren are likely to have friends who are about the same height
Identical twins often have slightly different weights at birth
Answers:
A dog breed can be made smaller by breeding together only the smallest dogs.
Identical twins are more likely to be about the same height than non-identical twins,
Explanation:
8. What is generated by the movement of tiny particles within an object? *
(2 Points)
endothermic
exothermic
heat
thermal
Answer: Thermal Energy
Explanation: I know this answer is correct because I had to look in my notebook for the definition
In my own words: Thermal Energy is the energy coming from heat which means it is generated by the movement of tiny particles with different objects.
Hope this helps! :)
1. Your big brother, despite warning, drops a penny off the observation
deck of the Empire State Building in New York City. The observation
deck is 381 m above the ground. What is the terminal velocity of the
penny? How far has the penny fallen after 3 seconds?
Answer:
The marble will take 8.813 seconds to hit the ground.
Explanation:
The marble will fall according to this motion equation: y(final) = y(initial) + v(initial)×t + 1/2×a×t×t
y(final)=0 m, the marble's final position in relation to the ground
y(initial)=381 m, the marble's initial position in relation to the ground
v(initial)=0 m/s (meters per second), the marble's initial velocity (speed with direction) when fall first begins
t=? seconds, this is the amount of time that passes while falling, the variable in this problem
a=-9.81 m/s/s, the rate at which the velocity of the marble changes, acceleration. On Earth, neglecting friction, acceleration is a constant at negative 9.81 meters per second squared
Plug the values into the equation: 0= 381 + 0t + 1/2(-9.81)(t)(t)
Subtract 381 from both sides and disregard 0t because it has no value and no longer matters: -381= 1/2(-9.81)(t)(t)
Multiply out the equation: -381= -4.905(t)(t)
Divide both sides by -4.905 to isolate the variable: 77.676=(t)(t)
Find the square root of both sides: t=8.813 seconds
a ray of light is incident in water at angle of 30 on water air plane mirror surface .find the angle of refraction in air.
Angle of incidence=angle of refraction
[tex]\\ \sf\longmapsto sin\:i=sin\:r[/tex]
sin i=30°[tex]\\ \sf\longmapsto sin\:r=30°[/tex]
Help on 27 and 28 thanks and pleasee
Answer:
27. 2nd Law of Motion ✔
28. 3 N ✔
Explanation:
27.
1st Law Of Motion
Force = 0 (not moves)2nd Law of Motion
Force = mass × acceleration (moves)3rd Law Of Motion
Force of Action = - Force of Reaction28.
'Cause force in the other direction, the net force is :
F = 10 N - 7 N
F = 3 N
Weight of an object remains same on the Earth and the Moon.
true or false?
Since the bullets also have zero velocity, a more exact description of the bullet's state would be _____.
Answer:
Static equilibrium.
Explanation:
PLEASE HELP ASAPPPPPPPPPPPPPPPPPPP
Answer:
Basketball
Explanation:
Im asuming basketball because a basketball has the least movement out of the rest of the answers.
An example of the law of gravity being applied is
Basketball dropping
Bike going off a jump
A diver pushing off a diving board
A flying disc being passed between two people
in loading a long lorry a man lifts boxes each of weight 100N and height of 1.5M.how much energy is transfered when one box is lifted
Explanation:
energy=100×1.5=150 joules
Vengo una ves en un minuto dos veces en un momento pero no vengo en diez años Ayudaaaaaaa
Answer:
La letra "m"
Explanation:
12. If the 50kg rock fell from the 20m high cliff, then what would its velocity be just before it
hits the ground?
Answer:
The velocity is 2.5 before hitting the ground
Explanation:
Mark me as brainliest
2021 edge
A baseball pitcher delivers a fast ball. During the throw, the speed of the ball increases from 0 to 30.0 m/s over a time of 0.100 seconds. The acceleration of the baseball is ____ m/s2.
a.
30
b.
3000
c.
300
d.
3
Why might a scientist use a physical model of a plant cell instead of studying
a cell directly?
A. A model can be used for things that are too hot to handle easily.
B. A model can be used for things that are too small to see clearly.
C. A model can be used for things that are too large to study directly.
D. A model can be used for things that are too simple to study
directly
B. A model can be used for things that are too small to see clearly
A car accelerates at 4 m/s/s from rest. What is the car's velocity after 5 seconds?
Answer:
3m/sec
Explanation
V=u+at
23=u+4*5
23=u+20
23-20=u
U=3m/sec
If the strength of the sun's magnetic field decreased from its current level, why would the temperature of sunspots increase?
Magnetic field lines emerge from one sunspot and re-enter at the other spot. Also, there are more sunspots during periods of increased magnetic activity. At ...
The temperature of sunspots increases because magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
What is the sun's magnetic field?The magnetic field of the sun has two poles, similar to a bar magnet. Every 11 years, at the peak of the solar activity cycle, the poles flip.
The magnetic field is carried away from the sun's surface and through the solar system by a solar wind made up of charged particles. The sun is more like a fluid than a solid ball.
Thus, the magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
Learn more about sun's magnetic field
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How does the suns energy contibute to the movement of water in the water cycle
Explanation:
The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go—energy, or heat. Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow.
Answer:
"The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle."
Explanation:
HELPPPP
A man is trying to push a box across a table. He pushes on the box with 5 N and the
table provides a frictional force of 1 N. What will be the net force on the box?
1) 4 N
2) 5 N
3) 6 N
4) Not enough information has been given
Answer:
4 Newton
Explanation:
because you minus 1 Newton from 5 newton
The net force on the box is equal to 4N. Therefore, option (1) is correct.
What is the net force?The net force can be described as the vector sum of forces acting on a particle or object. The net force can be defined as a single force showing same the effect of the original forces on the particle's motion. Net force gives the same acceleration as all those actual forces together.
The net force becomes the resultant force. It has the same effect on the rotational motion as all actual forces taken together by the object. Force is a vector quantity as it has a magnitude and a direction.
In the given problem, the applied force is in the opposite direction of the frictional force so we can find the net force by subtracting these two forces.
Given, the applied force to push the box = 5N
The frictional force on the box, = 1 N
The net force on the box = 5N + (-1N) = 4N
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7. A 77 kg girl and a 62 kg boy face each other on friction free roller skates. The girl pushes the boy, who moves away at a speed of 2.5 m/s. What is the girl's speed?
Answer:
[tex]\sf\longmapsto \: 2.0m/s[/tex]
Explanation:
Initial momentum = 0
[tex]\sf\longmapsto \: 77 \: velocity + 62 \times 2.5 = 0[/tex]
[tex]\sf\longmapsto \: 77 \: velocity = - 155[/tex]
[tex]\sf\longmapsto \: velocity = \frac{ - 155}{77} [/tex]
[tex]\sf\longmapsto \: \: velocity = - 2.012[/tex]
[tex]\sf\longmapsto \: 2.0 \: m/ s[/tex]
Over the 10 second period, how far does Juan run?
Answer:
C. 10
Explanation:
On the graph you can see that at the 10 second mark it is at the 10 meters mark as well.
Helppppppppppppppp please and explain!
ACTIVITY 1: Research a Famous Chemist or Physicist
1) Do research on a famous chemist or physicist. Write a 300-500 word essay one of them. Use at least three different sources. Sources can include biographies, internet articles from universities, or journal articles. Wikipedia is not an acceptable source information.
Be sure to answer these questions:
* What did this scientist discover?
* How was it discovered?
* How does this discovery or invention impact the world today?
(Scientist: Nikola Tesla)
Answer:
What did this scientist discover?
Nikola Tesla discovered and created Bluetooth back in 19, November 5, 1898.
"The Transmission of Electrical Energy Without Wires", Electrical World and Engineer, January 7, 1905. Tesla, Nikola, World System of Wireless Transmission of Energy, Telegraph and Telegraph Age, October 16, 1927.
How was it discovered?
In 1901 Tesla began his work of a large high-voltage wireless energy transmission station called the Wardenclyffe Tower. ... Some devices already employ wireless energy transfer without the use of metal contacts. The power is transferred through the plastic cases using magnetic induction.
How does this discovery or invention impact the world today?
It changed the new age by listening to music with wireless earbuds.
a raw egg and a hard boiled egg are rotating about the same axis of rotation with the same initial angular velocity. with the aid of diagram, explain which egg will rotate longer
Answer:
Boiled egg rolls slower than a raw egg , because it has a higher moment of inertia than a raw egg . In order to conserve angular momentum , the angular velocity of the boiled egg decreases.The hard boiled egg moves as if it was one solid unit. The raw egg has a solid shell but various types of fluids inside that can move independently of the shell. When you turn the egg to cause it to spin this rotating or turning force is called a torque. How the boiled egg spins? The rotating force on the shell of the hard boiled egg spins the entire egg –shell and content because the content is solid and moves when the shell moves. This egg easily spins and spins longer than does the raw egg.Explanation:
Hence, Boiled egg spins longer than raw egg.