Emily throws a soccer ball out of her dorm window to allison, who is waiting below to catch it. if emily throws the ball at an angle of 30º below the horizontal with a speed of 14m/s, how far from the base of the dorm should allison stand to catch the ball? assume the vertical distance between where emily releases the ball and allison catches it is 8.0m.

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)