The yield strength for an alloy that has an average grain diameter of 5.9 × 10-2 mm is 128 MPa. At a grain diameter of 6.6 × 10-3 mm, the yield strength increases to 268 MPa. At what grain diameter, in mm, will the yield strength be 236 MPa?

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?