Aclosed system of mass 2 kg undergoes an adiabatic process. the work done on the system is 30 kj. the velocity of the system changes from 3 m/s to 15 m/s. during the process, the elevation of the system increases 45 meters. the acceleration of gravity is g -9.8 m/s2. determine the change in internal energy of the system in kj.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.