An airtight box has a removable lid of area 246 times 10-2, Ask an Expert

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An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 8.55 × 104 Pa. The inside of the box is completely evacuated. What is the magnitude of the force required to pull the lid off the box?

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