Question:
Why does air feel cooler when blown through a small hole and warm when it blows through large hole
Answer:
According to Bernoulli s principle, faster the air moves, lower the pressure. So if we blow faster, then stream of air pressure becomes lower compared to the surrounding air. Thus the surrounding air fills in the stream. The surrounding air is cooler than the air in mouth. To determine this, blow fast, but put your finger right on your lip. It is found to be warm because other air does not mix.
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