The hot air rises up as its density increases.

With the rise in temperature of air its density increases.

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

When the air cools, its density :

As the volume increases with temperature, its density decreases.

Statement-1 : When an air bubble moves up from the bottom of a lake, its acceleration decreases and becomes zero. And Statement-2 : When an air bubble moves up from the bottom of a lake, its velocity increases and become constant.

in which fo the following cases the centre of mass of a rod is certainly not at its centre? (A) The density continuously increases from left ot right (B) The density continuously decreases from left to right (C) The density decreases from left to right up to the centre and then increases (D) The density increases from left to right up to the centre and then decreases Select correct alternative.

When the air gets heated, its density ......

Statement-1 : Sound travels faster in moist air Statement-2 : The density of moist air is less then density of dry air.

A baloon filled with helium rises against gravity increasing its potential energy. The speed of the baloon also increases as it rises. How do you reconcile this with the law of conservation of mechanical energy ? You can neglect viscous drag of air and assume that density of air is constant.

As we go higher, the density of air increases and hence pressure decreases