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An ideal spring with a stiffness of 379 N/m is attached to a wall, and its other end is attached to a block that has a mass of 16.0 kg. The spring/block system is then stretched away from the spring's relaxed position until 59.0 J of mechanical potential energy is stored in teh spring. Then the system is released to oscillate freely, with the block sliding horizontally on the level, frictionless floor. Find the speed of the block when the spring is compressed by 13.4 cm

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