Steam enters an adiabatic turbine steadily at 10 mpa, 500° celcius and leaves at 900 kpa. if the power output is 6 mw and the isentropic efficiency is 70 percent. determine: the mass flow rate of steam through the turbine, the temperature at the turbine exit, and the rate of change of entropy.

Apinion having 30 involute teeth of 6,5 module rotates at 220 r/min and transmits 2 kw to a gear wheel having 70 teeth; the addendum on both wheels is 4 of the circular pitch and the angle of obliquity is 200. determine; 3.1 the lengths of the path of approach and the arc of approach 3.2 the normal force between the teeth at an instant when there is only one pair of teeth in contact