A heat engine under development is expected to transfer heat from reservoir A to reservoir B. Which is a requirement for the two reservoirs?  A) The temperature of reservoir A must be greater than the temperature of reservoir B.   B) The temperature of reservoir A must be equal to the temperature of reservoir B.   C) The internal energy of reservoir A must be greater than the internal energy of reservoir B.   D)  internal energy of reservoir A must equal the internal energy of reservoir B.

Work of 1500 J is done by stirring an insulated beaker containing 100 g of water. a. What is the change in the internal energy of the system? b. What is the change in the temperature of the water?

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Problem 2:   This problem compares the energy output and heat transfer to the environment by two different types of nuclear power stations—one with the normal efficiency of 36 %, and another with an improved efficiency of 47 %. Suppose both have the same heat transfer into the engine in one day, 2.5 × 1014 J  Part (a)  How much more electrical energy is produced by the more efficient power station?  Part (b)  What is the change in the heat transfer to the environment after the upgrade to the more efficient power station?

A thermodynamic process can be represented using a PV diagram where the pressure and volume at every stage is recorded. In the thermodynamic process shown below the work done by the system is РА A O the area under the PV curve and positive the area under the PV curve and negative B is the product of the change in volume during the process and the change in pressure. cannot be found from the PV graph

A heat engine operates between a reservoir at 27°C and one at 374°C. What is the maximum efficiency possible for this engine?