air blown out from wider mouth is warmer than air blow out from shorter mouth? why
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When air is blown with your lips closer, it is acting like a nozzle. When a fluid flows through a nozzle, velocity increases where as pressure and temperature decreases. When you keep your mouth wide open and blow, your internal heat is being rejected without being any pressure drop. Hence the temperature is warm
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Answer:
When air is blown with your lips closer, it is acting like a nozzle. When a fluid flows through a nozzle, velocity increases where as pressure and temperature decreases. When you keep your mouth wide open and blow, your internal heat is being rejected without being any pressure drop. Hence the temperature is warmer.
Explanation:
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