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A room is experiencing a variety of energy flows into and out of it. One is...

A room is experiencing a variety of energy flows into and out of it. One is a flow of 5 kW into the room in the form of work (due to various electrical devices) and another varies with time such that ?̇dot = −12? + 93 kW.

At what time will the net energy change in the system be zero? b. How much energy was either removed or added to the system in this time? c. Is this a steady system? d. If a third constant energy flow is to be added such that when Qdot equals zero, the total energy change in the system is zero, how much energy must be added in kW

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