In my garage, i have a tank filled with compressed air, an ideal gas. the gas is at ‘room temperature,’ 25 °c and a gauge pressure of p1= 130 psi (896 kpa).the compressed air tank has a volume ∀1(given in .xls file). i allow the gas to flow through a small turbine (great yard sale [10 pts]if heat transfer with the surroundings is negligible, what is the maximum theoretical work푾풎풂풙i can extract if the turbine vents to an initially evacuated chamber ofvolume ∀2(given in .xls file)? **take atmospheric pressure to be 푃'()=101 kpa and the gas to have constant specific heats, cp= 1.004 kj/kg-k, k= 1.4

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

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

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?