Which of the following can not determine the state of a thermodynamic system
A
Pressure and volume
B
Volume and temperature
C
Temperature and pressure
D
Any one of pressure, volume or temperature
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D
Any one of pressure, volume or temperature
d (d)State of a thermodynamic state cannot determine by a single variable ($P$ or $V$ or $T$)
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The $P-V$ diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from $A → B → C$ is $50 J$ and $ 20\, cal$ heat is given to the system. The change in internal energy between $A$ and $C$ is ...... $J$
A refrigerator works between $4^o C$ and $30^o C.$ It is required to remove $600$ calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is ....... $W$ (Take $1\, cal \,=\, 4.2\, Joules\,)$
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