When an ideal gas at pressure p, temperature T and volume V is isothermally compressed to V/n, its pressure becomes $\displaystyle p_i$. If the gas is compressed adiabatically to $\displaystyle \frac{V}{n}$, its pressure becomes $\displaystyle p_a$. The ratio $\displaystyle p_i/p_a$ is $\displaystyle \left( \gamma = \frac{C_p}{C_V} \right)$

A gas expands isthermally an reversibly.The work done by the gas is ______.

Two spheres $A$ and $B$ with masses in the ratio $2 : 3$ and specific heat $2 : 3$ fall freely rest. If the rest in their temperatures on reaching the ground in the ratio $1 : 2$ the ratio of their heights of fall is:-

An ideal gas $A$ and a real gas $B$ have their volumes increased from $V$ to $2V$ under isothermal conditions.The increase in internal energy

An ideal monoatomic gas undergoes expansion according to $P=bV$,Where 'b' is a constant.Molar heat capacity of gas in the process is