You had learnt in your science books that hot air tends to always rise in. But why it rises only, what’s the reason behind it.
See every form of matter is made up of molecules which absorbs energies at different conditions or due to climatic effect. When a gas receives high temperature, it will try to expand always because a gas molecules are contracted untill a force of energy disturbs it. It’s molecules become charged when high temperature contacts it. Like, in hot summers, you don’t want a person to come near to you as it’s very hot and when anybody comes very near to you, supposed to say, bhag idhar se😂, go from here or otherwise I will smash up your face😂. Just like that, at high temperatures molecules don’t want to get contracted and wants to expand like a bird. Now question is why it rises, so as you know that mass of an object greatly determines what amount of gravity it needs, so in the process of expanding, molecules lose some of their energy or mass as well to move, like if you run and run, you will need some energy and as a result your mass also decreases, and due to low mass of hot air, gravity is not able to keep it in surface, so it rises.
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