Three turbine generators of 20 mw capacity are supplying a load of 48 mw and the load suddenly increases to 50 mw. two of the units are set with a speed droop of 9% and speed adjustment of 6%. the third unit is operating at zero speed droop and zero speed adjustment. determine the change in system frequency due to the sudden load change. what wi the speed change be if the load increases to 54 mw?

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.