A lossless round-rotor synchronous machine delivers 35 MW of active power to a balanced three-phase load. The load voltage is assumed at 20 kV L-L. If the machine has a synchronous reactance of 6 ohms and its power angle is 30 degrees, what is the magnitude of its internal voltage source

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0