3 years ago

If a substance absorbs energy but its temperature does not change, then the internal energy is changing.

Physics

1 answer:

Fed [463]3 years ago

4 0

If a substance absorbs energy but its temperature does not change, then the internal potential energy is changing.

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Natalie lifts a 15-kg rock from the ground onto a 1.5 meter high wall. what is the amount of potential energy she has given the

Zina [86]

The amount of gravitational potential energy acquired by the rock is equal to:
$\Delta U = mg \Delta h$
where
m is the mass of the rock
g is the gravitational acceleration
$\Delta h$ is the increase in height of the rock

Substituting the data of the problem, we find
$\Delta U=(15 kg)(9.81 m/s^2)(1.5 m)=220.7 J$
So, Natalie gave 220.7 J of energy to the rock.

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2 years ago

Please help, thank you!

VARVARA [1.3K]

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