A circuit's total capacitance measures 0.04 pF. If the circuit is supplied by an AC power source operating at 2 kHz, what is the circuit's capacitive reactance? A. 2.225
B. 1.628
C. 1.225
D. 1.990

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)