Question
A glass flask of volume $250 \mathrm{~cm}^3$ is just filled with mercury at $20^{\circ} \mathrm{C}$. How much mercury overflows when the temperature of the system is raised to $100^{\circ} \mathrm{C}$ ? The coefficient of volume expansion of glass is $12 \times 10^{-6}\left({ }^{\circ} \mathrm{C}\right)^{-1}$ and that of mercury is $18 \times 10^{-5}\left({ }^{\circ} \mathrm{C}\right)^{-1}$.
