A stirrer-container assembly contains a certain amount of fluid. The stirrer performs (3 mathrm{hp}) work on the

Question:

A stirrer-container assembly contains a certain amount of fluid. The stirrer performs $3 \mathrm{hp}$ work on the system. The heat developed by stirring is $4000 \mathrm{~kJ} / \mathrm{h}$ and is transferred to the surroundings. Determine the change in internal energy of the system.

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