Thanks for not answering my questions. What is the point of having subscription here if there is no HELP !!!

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?