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Each of the space shuttle's main engines is fed liquid hydro

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Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 617 rev/s. A point on one of the blades traces out a circle with a radius of 0.020 m as the blade rotates. What is the magnitude of the centripetal acceleration that the blade must sustain at this point?

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