A 25 mm diameter uniform steel shaft is 600 mm long between

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A 25 mm diameter uniform steel shaft is 600 mm long between bearings.

a) find the lowest critical speed of the shaft

b) If the goal is to double the critical speed, find the new diamters

c) A half sized model of the original shaft has what critical speed?

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A 25 mm diameter uniform steel shaft is 600 mm long between : a 25 mm diameter uniform steel shaft is 600 mm long between bearings.a find the lowest critical speed of the shaftb if

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