Two states of matter are described below. state a: cannot be compressed and retains its shape state b: highly compressible which combination of the state and a substance in that state is correct? state a = air; state b = neon state a = water; state b = number cube state a = water; state b = oxygen state a = piece of metal; state b = air

Place me with this question is my last question

Which planet do you think would be easiest for humans to colonize some day?

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)