3\4 masks Qus.

1\2 masks Qus.

The role of the activation charcoal in gas mask used coal mine is

What is the role of activated charcoal in gas mask used in coal mines?

What is the role of activated charcoal in gas mask used in coal mines?

Potassium superoxide (KO_(2)) is used in space capsuled, submarined, and breathing masks, because it is

A spring of spring constant k stores 5 J of energy when stretched by 25 cm. It is kept vertical with one end fixed. A mass m is attached to the other end. It maskes 5 Oscillation per second. Then