To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen, and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why?

AcademicPhysicsNCERTClass 7

B\'s exhaust fan will expel hot air more effectively. As we know that hot air gets expanded and becomes lighter. Hot air rises up. So the volume of hot air reaching B\'s exhaust fan will be much greater than that of A\'s.

raja
Updated on 10-Oct-2022 13:29:49

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