Cart(m=2.0) is traveling to the right at 3.50m/s toward cart Y. Cart Y (m=9.0kg) is traveling to the left at 1.5 m/s. Cart X and Cart Y collide inestically. Calculate the total momentum of the two-cart system after the collision.​

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)