why hot air is lighter than cold air
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hot air is less dense than cold air therefore it is lighter
RUSHABH111:
The reason this happens has to do with the nature of heat. When an object or substance heats up, the atoms which compose it start to move and vibrate more quickly. This vibration pushes them apart, causing them to take up more space. That means that a given volume of air (or water, or whatever) will have fewer atoms in it, because some of them were pushed out as it expanded. Fewer atoms means less mass, means less weight per volume. Less weight per volume means less density.
this is the right answer
but the air of mountains is cold although mountains at at height
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7
The particles of cold air are much compact than hot air,therefore,the particles of cold air are much denser than hot air.
Therefore cold air sinks down and hot air rises upwards
Therefore cold air sinks down and hot air rises upwards
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