A8.10×103 ‑kg car is travelling at 25.8 m/s when the driver decides to exit the freeway by going up a ramp. after coasting 383 m along the exit ramp, the car's speed is 12.6 m/s, and it is ℎ=12.5 m above the freeway. what is the magnitude of the average drag force exerted on the car?

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)