An ideal gas expands isothermally performing 4.30 x 10³ of work in the process. Calculate (a) the change in internal energy of the gas, and (b) the heat absorbed during this expansion.​

Why there is no inductive reactance in dc circuits

Why is the use of carbon-14 limited

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)