In the isothermal process ____ remains constant.

Who gave the first evidence of Big bang theory?

Refraction of star light through the earth’s atmosphere causes

The unit of viscosity is

Thermopile works on the principle of

A man is sitting in a boat which is floating in pond. If the man drinks some water from the pond, the level of water in the pond will

Decibel is the unit of physical quantity used for

DC current can be controlled by which one of the following components?

In a pressure cooker cooking is faster because the increase in vapour pressure

The frequency of sound waves in the audible range is