PHYSICS HIGH SCHOOL

Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the ground? A.
Gravitational potential energy increases; kinetic energy increases.


B.
Kinetic energy equals gravitational potential energy.


C.
Kinetic energy increases; gravitational potential energy decreases.


D.
The mass of the ball is required to answer this.

Answers

Answer 1
Answer:

The ball originally contains potential energy and no kinetic energy, therefore we can use the theory of conservation of mechanical energy. Its total energy, which is made up of the KE and PE, is constant and equal to its starting PE as it falls. Thus, option C is correct.

What potential and kinetic energy of a ball thrown up?

As the ball falls toward the ground, its gravitational potential energy is transformed into kinetic energy. The kinetic energy of the ball will increase as it accelerates until it collides with something. The ball's collision generates kinetic energy, which is transformed into several forms of energy.

As it rises, the ball's speed slows until the very apex of its motion, where it briefly pauses. At the peak, it accelerates at -9.8 m/s2.

Therefore, A ball is thrown up into the air, yet although though it rises into the air, the direction, and velocity of the ball are actually downward.

Learn more about kinetic energy here:

brainly.com/question/26472013

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Answer 2
Answer: The answer is c, because ball is falling so its gravitationl potential energy decreases, but it kinetic energy increases. Energy is always conserved.

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A block of metal initially at 25°C is submerged in water initially at 75°C in a coffee cup. Which of the following is true? a. The final temperature of the coffee cup will be less than 20°C.
b. The final temperature of the coffee cup will be higher than 25°C but less than 75°C.
c. The final temperature of the coffee cup will be more than 80°C.
d. The final temperature of the coffee cup will be 80°C.

Answers

Answer:

b. The final temperature of the coffee cup will be higher than 25°C but less than 75°C.

Explanation:

We know in thermal equilibrium.

Heat loss by one object = Heat gain by other object.

Now, heat is loss by the object whose temperature is higher than other because heat travels from high temperature to other.

And the object who gain heat its temperature increases till both body reach same temperature.

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When white light splits into the spectrum of colours of which it is composed, it is said to have undergone

Answers

When white light splits into the spectrum of colors of which it is composed, it is said to have undergone dispersion. Dispersion happens when white light gets separated into colors based on the wavelength of the light. Due to dispersion of light, people can see a rainbow in the sky. I hope the answer helps.

Where is a bibliography or works-cited list placed within a paper or report?in the introductory material
at the bottom of each page
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in the appendix

Answers

Answer:

at the end of the page

Explanation:

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Answer:

at the end

Explanation:

A planet moves fastest when it is ___________________ to the Sun and slowest when it is ___________________ from the Sun. Choose one: A. farthest; closest B. at the nearest focus; at the farthest focus C. closest; farthest

Answers

Answer:

option (c) is correct

Explanation:

A planet moves fastest when it is closest to the Sun and slowest when it is farthest from the Sun.

Answer:

fastest when closest to the Sun, slowest when it is farthest

Explanation:

Plato/Edmentum

Power is transmitted great distances at ______ voltage and ______ current. a low, medium b high, medium c high, low d low, high

Answers

The correct answer to the question stated above is letter c, high, low.

Power is transmitted great distances at high voltage and low current. 

>The reason why  electrical energy transmitted at high voltage and low current is :  so that huge amount of power can be delivered at long distances by using only small size of wires.

Which project involved the goal of orbiting a manned spacecraft around earth? A. Mercury

B. Apollo

C. Gemini

D. Skylab

Answers

A. Mercury
Project Mercury was designed to send a person into orbit before the Soviet Union did so.

Answer:

The anser is A. Mercury

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