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Two carts collide in a perfectly elastic collision. Cart A has a mass of 0.8 kg and an initial velocity of 0.18 m/s. It hits cart B, which has a mass of 0.7 kg and an initial velocity of 0.11 m/s in the direction opposite to the direction of cart A. What is the final speed of each cart? If they make a completely inelastic collision, what would their final speed be?

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