Does Hot Air Rises?
Does Hot air Rises (Video Experiment Urdu) In this video Aimen Rasheed will show you with experiment. The experiment can be performed by above 5-grade students under adult supervision.
Material required
Candles, Paper, round ice sticks pins, matchbox
Why does hot air rise?
A given amount (mass) of air takes up more space when it is hot. In other words, hot air is less dense than cold air. Any substance that is less dense than the fluid (gas or liquid) of its surroundings will float. So, just as wood floats because it is less than water, hot air floats on cold air because it is less dense. This how hot air balloons get their lift.
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