Work, Energy and Power — Physics STD 11 — Question

The average translational K.E. of O2(molar mass 32) molecules at a particular temperature is 0.048 eV. The translational K.E. of N2 (molar mass 28) molecules in eV at the same temperature is ……….

Four molecules have speed 2 km/s, 3 km/s, 4 km/s and 5 km/s. The rms speed of these molecules in km/s is …….

The work done by the conservative forces in a cycle is

Two forces are in the ratio of 3 : 4. The maximum and minimum of their resultants are in the ratio is –

Red shift is an illustration of ……….

Mass of observable universe …..

A metal sheet with a circular hole is heated. The hole will

Lami’s theorem is applicable only when the system of forces are is –

If the angle between force and displacement is obtuse, then the work done is

In sliding, the resultant velocity of a point of contact acts along –