Which of the following are true statements about the role of electrical power in the u. s.? (a) electricity generation is responsible for more than 1/3 of our total energy consumption. (b) most of our electricity comes from burning natural gas. (c) most of our electricity comes from burning coal.(d) the typical electricity generating power station is more than 50% efficient

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.