ScienceClass 7CBSE
Q
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?
A
Soln:
Exhaust fan of B will expel the hot air effectively as air rises up and her fan is at a greater height than A’s.