An otto engine has a cylinder bore of 50mm, stroke of 75mm and clearance volume of 21.3 cubic centimeter. if the process of compression is isothermal and reversible and air at 1 bar is compressed to 9 bar and a temperature of 800c. find the efficiency of the engine, the carnot efficiency. is this engine feasible one.

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

List and describe in sequence the operation process steps for boxf machine?

Areheat rankine cycle operates with water as the working fluid. steam enters the first turbine at 8 mpa and 450°c and exits at 0.8 mpa. it is then reheated to 400°c before entering the second turbine, where it exits at 10 kpa. if the amount of work into the pump is 8.04 kj/kg and the net work per cycle produced is 1410.25 kj/kg, determine the thermal efficiency of the cycle.