Acompressed-air tank holds 8.1ft^3 of air at 120 lbf/in^2 "gage," that is, above atmospheric pressure. estimate the energy, in ft-lbf, required to compress this air from the atmosphere. assuming an ideal isothermal process.

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.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa