Under what conditions, the velocity of a body falling in a medium (i) increases with time (ii) becomes constant with time (iii) becomes zero with time.

The velocity of fall of a man jumping with a parachute first increases and then becomes constant. Explain.

Under what condition, a reversible process becomes irreverible?

Assertion : The velocity of fall of a man jumping with a parachute first increases and then becomes constant. Reason : The constant velocity of fall of man is called terminal velocity.

Under what condition, a reversible process becomes irreversible?

If each edge of a cube is doubled, then its volume: (a) is doubled (b) becomes 4 times (c) becomes 6 times (d) becomes 8 times

If pressure of a gas increases upto nine times keeping temperature constant then its rms velocity will become

If pressure of a gas increases upto nine times keeping temperature constant then its rms velocity will become