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March 29, 2017

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In order to reduce potential danger to the environment, a biohazard laboratory maintains an internal air pressure that is 1% lower than atmospheric pressure. The net force acting on a 1.8-m2 external window of this laboratory due to air pressure is most nearly

1.8 N
18 N
1.8 × 102 N
1.8 × 103 N
1.8 × 104 N

I thought I would just find 1% of atmospheric pressure and this was 1013 (atmospheric pressure is 101300 Pa). From using the P=F/A equation I think the answer is either 1.8e3 or 1.8e4... Can someone help me to ensure my calculations to reach my answer?

  • Physics check my answer! - ,

    101325/100=1013 Pa,
    1013•1.8 =1.8•10^3 N

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