If two equal material rod having different length be heated to equal temperature then will they expand equally? Justify your answer. Why inver is used in standard meter scale?

Why should the objective of a telescope have large focal length and large aperture? Justify your answer.

Will the velocity be equal of two different ideal gas at same temperature? Give reason.

Two bodies of different masses have equal kinetic energies . Which will have more momentum ?

Two rods of different materials are of the same length and cross-sectional area. They are joined lengthwise and rigidly fixed between two walls. The materials of the two rods have different thermal and mechanical properties. What should be the relation between the Young's moduli and the coefficients of linear expansion of the two materials so that the position of the junction point of the rods does not alter even when heated?

If two bodies of equal mass but of different materials are supplied equal amounts of heat, which one will have higher irse in temperature?

If an ideal gas expands adiabatically will its temperature increase or decrease? Use first law of thermodynamics to justify your answer.

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -I: Two different ideal gases have equal root mean square speed at the same temperature. Statement - II: Root mean square speed of a gas molecules increases with increase in temperature.

The length of a brass rod is to be measured at different temperatures. For this, the accuracy will be the highest if the scale is made of which material?