The radius of the bar’s circular cross-section varies linearly from 10 mm at x = 0 to 5 mm at x = 150 mm. the shear modulus of the material is g = 17 gpa. (a) what torque t would cause a maximum shear stress of 10 mpa at x = 80 mm? [15 pts] (b) what torque t would cause the end of the bar to rotate 1°? [15 pts

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]