Problem:
CO2 is contained in a vertical cylinder at a pressure of 30 atm by a piston with a mass of 57 lbm. If g is 32.4 ft/sec2 and the barometric pressure is 29.7 in. Hg what is the area of the piston?
Relevant equations
F = Ma/gc
W = Mg/gc
P= F/A
gc = 32.174 lbm ft / (lbf sec2)
1 atm = 29.9...