How much kinetic energy did each piece acquire

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Q. Airtight box has a removable lid of area 1x10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85x 10^5Pa. The inside of the box is completely evacuated. What is the magnitude of the force essential to pull the lid off the box?

Q. An explosion breaks an object into two pieces, one of which has 1.50 times the mass of the other. If 7800 J were free in the explosion, how much kinetic energy did each piece acquire?

Reference no: EM1382617

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