A certain electric motor produced `16kJ` of energy each second as mechanical work and lost `3kJ` as heat to the surroundings. What is the change in the internal energy of the motor and its power supply each second?

Explanation

To find the change in internal energy of the motor and its power supply each second, we can use the first law of thermodynamics, which states:

\[ Q = \Delta U + W \]

Where:
- \( Q \) is the heat added to the system (in this case, it's heat lost, so it will be negative),
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