What is volume expansion ? Give definition and unit of coefficient of volume expansion.

Two marks on a glass rod $10\, cm$ apart are found to increase their distance by $0.08\, mm$ when the rod is heated from $0\,^oC$ to $100\,^oC$. A flask made of the same glass as that of rod measures a volume $1000\, cc$ at $0\,^oC$. The volume it measures at $100\,^oC$ in $cc$ is

If the length of a cylinder on heating increases by $2\%$, the area of its base will increase by ....... $\%$

If in winter season the surface temperature of lake is $1^{\circ} C$, the temperature at the bottom of lake will be ............

A uniform metal rod is used as a bar pendulum. If the room temperature rises by $10°C$, and the coefficient of linear expansion of the metal of the rod is $2 \times 10^{-6}$ per $°C,$ the period of the pendulum will have percentage increase of

A thin copper wire of length $L$ increase in length by $1\%$ when heated from temperature $T_1$ to $T_2$. What is the percentage change in area when a thin copper plate having dimensions $2L\times  L$ is heated from $T_1$ to $T_2$ ? ....... $\%$