I need help I don’t know how to do this type of problem During an emergency stop, a 1.5 x 10^3-kilogram car lost a total of 3.0 x 10^5 joules of kinetic energy. What was the speed of the car at the moment the
brakes were applied? *

A. 10 m/s

B. 14 m/s

C. 20 m/s

D. 25m/s

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)