Find the missing property of p, t, v, u, h, and x and indicate the indicate the states in a p-v and a t-v diagram for a)-water at 5000 kpa, u=1000 kj/kg a. b)- r-134a at 20 c, u = 300 kj/kg b. c)- nitrogen at 250 k, 200 kpa c.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero