Compute the line shaft diameter to transmit 12 HP at 180 rpm with torsional deflection of 0.08 degrees per ft. length.

Compute the diameter of a mild steel rod which have been cold 
worked to 27.59% having original diameter of 23.15mm?

plz answer its question.

A shaft is subjected to a maximum torque of 14 KN-m and a maximum bending moment of 10 KN- m at 
a particular section. Determine the diameter of the shaft according to maximum shear stress theory if the 
elastic limit in simple tension is 180 MPa

 A 2 cm diameter glass rd (k = 0.8 W/mK) is 6 cm long. It has base temperature at 120ºC 
and is exposed to air at 20ºC. The temperature at the tip of the rod is measured as 35ºC. 
What is the convection heat transfer coefficient? How much heat is lost by the rod?