With the rise in temperature of air its density increases.

With a rise in temperature, the density increases maximum in case of

As the volume increases with temperature, its density decreases.

On increasing the temperature of a conductor, its resistance increases because

The hot air rises up as its density increases.

With rise in temperature, viscosity of a liquid

When the air cools, its density :

By increasing temperature of a gas by 6^@ C its pressure increases by 0.4%, at constant volume. Then initial temperature of gas is

The electrical conductivity of a metal decreases with rise in temperature while that of semi-conductor increases. Justify.

Give reasons The electrical conductivity of a metal decreases with rise in temperature, while that of a semiconductor increases.

Density of water varies with temperature. What are its consequences ?