A"sun yacht" is a spacecraft with a large sail that is pushed by sunlight. although such a push is tiny in everyday circumstances, it can be large enough to send the spacecraft outward from the sun on a cost-free but slow trip. suppose that the spacecraft has a mass of 900 kg and receives a push of 20 n. (a) what is the magnitude of the resulting acceleration? if the craft starts from rest,(b) how far will it travel in 1 day and (c) how fast will it then be moving?

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)