A tank of water has a shaft rotating at 60 rpm with a torque of 40 N-m that is stiring the water. A heater is also present that operates at 120V and draws 4A of current. Heat is then removed from the water such the the total energy content of hte water is constant. How much heat is removed?

Q: A Carnot engine rejects 60 Btu of heat to a reservoir at 55 degrees F. If this engine produces 85…

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Q: Evaluate whether this refrigerator is possible. The inside temperature is -10degC in the icebox. The…

A: Given Data TH=25°C=298 K Tc=-10°C=263 K COP=7.5

Q: A carnot heat pump is operating to keep a room at 20C. The unit is taking in air from a -30C…

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Q: capacity

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Q: The motor of an electrical appliance consumes 18 000 J. during its operation, 9450 J dissipated in…

A: Given: Energy consumed by the motor is 18 000 J. Heat dissipation is 9450 J. Energy to produce light…

Q: A heat engine of 30% efficiency drives a heat pump of COP 5. The heat is transferred both from…

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Q: A system is proposed to generate power from wastewater of 54C. If the ambient temperature is 23C,…

A: Highest thermal efficiency is given by  ηmax = Work outputHeat input          = Q1-Q2Q1           =…

Q: maximum COP of the machine b. The minimum power in watts required of the machine

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.