The solid circular steel shaft of a screwdriver is subjected to a pure torque of T = 25 lb·in. The shaft has a diameter of 0.249 in. and a length of L = 4.50 in. The shear modulus of the steel is G = 11,300 ksi. Determine the magnitude of the angle of twist of the shaft in degrees.

A torque of 25 lb·in. is applied to one end of a 7-in.-long composite shaft that consists of two polymer tubes. The outer tube has a polar moment of inertia of 0.0325 in.4 and a shear modulus of 165 ksi. The inner tube has a polar moment of inertia of 0.00169 in.4 and a shear modulus of 190 ksi. Determine the magnitude of the torque produced in the inner tube.

The same perpendicular force is applied to the handles of three ratchets and creates torque. They have the same modulus of rigidity but different lengths and diameters. Which one will provide the smallest torque?

A steel socket extension (2) has a diameter of 0.49 in. and a length of L = 1.8 in. It connects socket (3) to ratchet handle (1) which is 7.1 in. long. If a perpendicular force of 20 lb is applied to the end of the ratchet handle, determine the maximum shear stress in the socket extension.

A gear train is composed of four gears, where gears A and B are on the same shaft. Gear A has 60 teeth, gear B has 36 teeth, gear C has 48 teeth, and gear D has 12 teeth. If a torque of 1.93 N·m is applied to gear A, determine the torque at gear D.

A load of P = 17 N is applied to a hex wrench that has lengths a = 33 mm and b = 119 mm. Determine the torque applied to the set screw.

A steel socket extension (2) has a diameter of 0.47 in. and a length of L = 1.5 in. It connects socket (3) to ratchet handle (1) which is 6.7 in. long. If a perpendicular force of 15 lb is applied to the end of the ratchet handle, determine the maximum shear stress in the socket extension.

A steel socket extension (2) has a diameter of 0.48 in. and a length of L = 1.8 in. It connects socket (3) to ratchet handle (1) which is 7.3 in. long. If a perpendicular force of 19 lb is applied to the end of the ratchet handle, determine the maximum shear stress in the socket extension.

A steel socket extension (2) has a diameter of 0.48 in. and a length of L = 5.0 in. It connects socket (3) to ratchet handle (1), which is 6.8 in. long. If a perpendicular force of 11 lb is applied to the end of the ratchet handle, determine the socket extension’s angle of twist.

How much heat is absorbed by a 20 (kg) of water when its temperature rises from 10 (0C) to 95 (0C)? The specific heat capacity of water is 4180 (J/Kg0C)