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A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.20 m/s and rebounds with a velocity of -1.60 m/s. The ball remains in contact with the cushion for a time of 3.30 × 10-3 s. What is the average net force (magnitude and direction) exerted on the ball by the cushion?
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An Italian chef, who is very scientific in her approach to cooking, measures the specific heat of a porcini mushroom by placing it in a calorimeter filled with 0.678 kg of olive oil at 13.2°C. What is the specific heat of the mushroom
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