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A solid shaft 200 mm in diameter rotates at f = 20 rev/sec and is subjected to a bending moment of 21p kN.m. Determine the torque T and power P that can also act simultaneously on the shaft without exceeding a resultant shearing stress of 56 MPa and a resultant normal stress of 98 MPa. (With f expressed in rev/sec and torque in N.m,P=2pf·T in watts.)
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an electric wire made of c14500 copper is stretched between two street supports at 20degc so that a stress of 40 mpa is
a heat exchanger brings 9 kgs water from 250 c to 600 c at 2000 kpa using air coming in at 1300 k and leaving at 450k.
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