00:01
We are asked why hot air balloon floats above the ground.
00:05
So hot air balloon, but float above the ground.
00:19
So this is the concept of a kinetic theory of gas.
00:26
So we know that gas inside a random motion, the branding motion, and they collide with themselves and with the wall of the container that they are occupying in this case, the hair balloon.
00:41
So this continuous collision of molecules with the surface results in pressure because pressure is force exacted by unit area so as a collide with the surface, the exacting the force on the surface.
00:52
And as the number of the gas particles increase, the force that has been exacted on the surface increase which consequential leads to an increase in pressure.
01:03
So using the charge law that states that the volume is directly proportional to temperature the higher the temperature of the gas the higher the volume that the gas will occupy because the gas will gain kinetic energy and then they expands that leads to an equal sum volume so when volume is higher the density is smaller because we know that density is mass over volume so if this is big then this is small so that that's exactly what is happening...