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Find the limiting peripheral velocity of a rotating steel ring if the allowable stress is 20 ksi and steel weighs 490 lb/ft. At what

Find the limiting peripheral velocity of a rotating steel ring if the allowable stress is 20 ksi and steel weighs 490 lb/ft. At what revolutions per minute (rpm) will the stress reach 30 ksi if the mean radius is 10 in.?

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