2 years ago

What is the Gravitational Potential Energy of a 30 kg box lifted 1.5 meters off the ground?

Physics

1 answer:

juin [17]2 years ago

6 0

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 30 × 9.8 × 1.5

We have the final answer as

Hope this helps you

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Jin knows that the initial internal energy of a closed system is 78 J and the final internal energy is 180 J. He also knows that

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As we know by the first law of thermodynamics

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here we know that

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now we can say that heat will be given as

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now here we can say that Jin does the error in his first step while calculation of change in internal energy as he had to subtract it while he added the two energy

So best describe Jin's Error is

<em>B )For step 1, he should have subtracted 78 J from 180 J to find the change in internal energy. </em>

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