PART - 2 CH - 9 Mechanical Properties of Fluids — Physics STD 11 Science — Question

Mode of wave propagation in which particles of medium vibrate perpendicular to direction of propagation is known as _______.

Kinetic theory of gases was developed by              .

Fill in the blanks by suitable conversion of units:
3.0m s^-2 = .... km h-²

The rotational analogue of force in linear motion is ............. .

Device which converts continuously heat energy into mechanical energy in a cyclic process is known as _________.

Minimum safe speed V_min =....................

If the temperature of the source is increased, the efficiency of a Carnot engine ­­________________.

There is a relation between surface tension and surface energy is ____________.

A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is:

1. 3 : 2
2. 2 : 3
3. 9 : 4
4. 4 : 9