Question

An airtight box, having a lid of area 80.0 cm2, is partially evacuated. Atmospheric pressure is 1.01x105Pa. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:
A) 1.35 x104Pa
B) 2.60x104Pa
C) 4.10 x104Pa
D) 8.75 x104Pa
E) 1.36 x105Pa

Answer

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