Air flows steadily through an engine at a constant temperature, 400K. What is the work per kg if the exit pressure is one third and the inlet rpessure is 207 kPa? Assumr the kinetic and potential energy variation is negligible. R=287 kJ/kg K. A. 14.5 kJ B. 210.7 kJ C. 126.1 kJ D. 126.3 kJ

Refrigerant R-134a at 200 kPa and 50 ⁰C enters an adiabatic diffuser steadily with a velocityof 140 m/s and leaves at 500 kPa and 150 ⁰C. Determine:  a) The exit velocityb) The inlet to exit area ratioc) The inlet exit density ratio    clear writing please

Q40. a)What mechanical forces are generated in a reciprocating compressor? b) Briefly explain them.

A steady stream of steam passes through an adiabatic turbine. It enters at 10 MPa, 450 °C and 80 m/s and at the exit it is 500 KPa, 40% quality and 30 m/s. The mass flow of the steam is 12 kg/s. a) With the power that comes out of the system, 252 100 W bulbs can be lit. Calculate the efficiency of the system. b) What is the area of ​​the duct at the entrance? c) What is the volumetric flow at the outlet? d) What is the temperature of the steam at the outlet?