Atmospheric pressure is nearly 100Kpa. How large the force does the air in a room exert on the inside of a window pan that is 40 cm×80 cm ?

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32 ×103 N

48 ×103 N

22 ×103 N

55 ×103 N

answer is A.

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Detailed Solution

Given atmospheric pressure P=100 k pa=105 pa Area A=40 cm ×80 cm=40×80×10−4 m ∴Force F=pressure×Area ⇒F=105×40×80×10−4 ∴F=32 ×103N

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