Start with the free convection correlation for the vertical plates introduced in the lecture, show that for air at atmospheric pressure and a film temperature of 400 K, the average heat transfer coefficient can be expressed as 1/4 10* < Ra< 10° hy 1.40 (65) hy = 0.984T1/3 10º < Raj < 1013 where AT = Ts – T.

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.

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

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86