The ventilators in the rooms are used to expel cold air.

Pulmonary ventilation movements are due to:

STATEMENT-1 : 1//4^(th) of the initial mole of the air is expelled, if air present in an open vessel is heated from 27^(@)C to 127^(@)C . STATEMENT-2 : Rate of diffusion of a gas is inversely proportional to the square root of its molecular mass.

Suppose you are in a dark room . Can you see objects in the room ?Can you see objects outside the room ? Explain.

Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.

The velocity of sound in air at room temperature

Give the technical terms used for the following: Small air sacs of the lung through the walls of which gaseous exchange takes place between blood and air.

Measure length, width and height of your class room and find the total area of the room which is to be white washed.

Give the cause of common cold and filariasis.