A solid sphere of radius 'R' made of a material with a volume expansion coefficient '$\gamma$' is heated by $\Delta T$. The fractional change in its moment of inertia about a diameter is:

A clock with a brass pendulum keep correct time at ${20^0}C$ but loses 8.212 s per day when the temperature rises to ${30^0}C$. The coefficient of linear expansion of brass is?

The ratio of the lengths of two rods is 4:3 the ratio of their coefficients of cubical expansion is 2:3 then the ratio of their linear expansions when they are heated through same temperature different is

The temperature of a substance increases by ${27^0}C$. On the Kelvin scale this increase is equal to

Two rods of different materials but of the same length and cross-sectional area are heated through the same temperature difference. If their linear expansivities are $\alpha_1$ and $\alpha_2$ respectively, the difference in their elongation is:

If a metal rod experiences a temperature increase, what generally happens to its length?

If a graph is plotted taking the temperature in Fahrenheit along Y-axis and the corresponding temperature in Celsius along the X-axis, it will be a straight line

A steel bridge is built with expansion joints because:

A wheel is 80.3 cm in circumference. An iron tyre measures 80.0 cm around its inner face. If the coefficient of linear expansion for iron is $12 imes {10^{ - 6}}^ \circ {C^{ - 1}}$, the temperature of the tyre must be raised by

Which of the following pairs is wrong

One quality of a thermometer is that its heat capacity should be small. If $P$ is a mercury thermometer, $Q$ is a resistance thermometer and $R$ thermocouple type then