Why is it impossible for a ship to use the internal energy of the seawater to run?
A ship cannot use the internal energy of sea water to run because there is no suitable sink of lower temperature so that internal energy can be converted into mechanical work. Hence, it is impossible.
215 Views
If the door of refrigerator is kept open will it cool the room?
If the door of the refrigerator is kept open, the room will not be cooled but the temperature of the room will rather increase because refrigerator takes less heat from the space inside the refrigerator and rejects more cold atmosphere to the room.
154 Views
Define coefficient of performance of refrigerator.
The coefficient of performance is the ratio of heat absorbed from sink to the work done on the working substance to reject the heat.
Mathematically, it is given by
353 Views
The temperatures of source and sink of a Carnot engine are 300°C and 300K. Find the efficiency of the engine.