Emma L.

asked • 11/25/20

What is its change in internal energy?

Air in a balloon does 57 J of work while absorbing 98 J of heat. What is its change in internal energy?

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Mike D. answered • 11/25/20

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Well it gains 98 J of energy but loses 57 J as it does 57 J of work


So change is 98 - 57

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Emma L.

A machinist wishes to insert a steel rod with a diameter of 9 mm into a hole with a diameter of 8.998 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it fit the hole?
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11/26/20

Mike D.

I posted an answer to this
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11/26/20

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