If you set out to explore the surface of the Moon, you would wear a thermally insulated space suit. In such activity, you might expect to generate roughly 4 kJ of heat per kilogram of mass per hour. If all this heat were retained by your body, how much would your body temperature increase per hour owing to this rate of heat production? (Assume that your heat capacity is roughly that of water) What time limit would you recommend for a moon walk under these conditions?

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)