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elena-14-01-66 [18.8K]
3 years ago
7

If you measure a change in temperature, then the _____.

Physics
1 answer:
kherson [118]3 years ago
6 0

Answer:

C. total heat energy of the substance has increased

Explanation:

This is because when there is a change in temperature, the heat energy of a substance either increases or decreases. If the temperature increases, its heat energy increases and if its temperature decreases, its heat enery decreases.

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The diagram shows a ball resting at the top of a hill.
WARRIOR [948]

Answer:

a) The potential energy in the system is greatest at X.

Explanation:

Let be X the point where a ball rests at the top of a hill. By applying the Principle of Energy Conservation, the total energy in the physical system remains constant and gravitational potential energy at the top of the hill is equal to the sum of kinetic energy, a lower gravitational energy and dissipated work due to nonconservative forces (friction, dragging).

U_{grav, X} = U_{grav, Y} + K_{Y} + \Delta W_{X \rightarrow Y} = U_{grav,Z}+\Delta W_{X \rightarrow Z}

Conclusions are showed as follows:

a) The potential energy in the system is greatest at X.

b) The kinetic energy is the lowest at X and Z.

c) Total energy remains constant as the ball moves from X to Y.

Hence, the correct answer is A.

7 0
3 years ago
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Which atmospheric layer prevents meteoroids from reaching earth’s surface
Natalija [7]
Stratosphere because the atmosphere get denser
5 0
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Calculate the momentum of a 10kg bowling ball rolling at 2 m/s.
Helen [10]

Answer:

20 kg. m/s

Explanation:

p = mv

m = 10 kg

v = 2 m/s

p = 10 × 2

p = 20 kg m/s

5 0
3 years ago
What is a substance?
Effectus [21]

Answer:

A. a uniform mixture that can't be separated

8 0
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If a net force of 250 N causes an object to accelerate at 20m/s^2 what must its mass be?
aleksandr82 [10.1K]
The answer is 12.5 kg because 250N / 20m/s^2

I hope that helped
7 0
3 years ago
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