I need to find the volume of air (ft^3) for this sample. The air is discharged at 40 psi for 1 minute and the diameter of the pipe is 0.5 inches (Area = 0.001363538 ft^2). I think I need to solve for the velocity of the air (vel = sqrt(2P/rho), where P is the pressure and rho is the density). For the density I will assume the air is at 70°F and atmospheric pressure, so the density will be 0.074887 lbm/ft^3. I think I keep messing up with my units so I am not sure if I have the right answer or not. In US units I get about 32 ft^3 (I may be using the gravitational constant incorrectly). In SI units I get about 5.14 m^3 (181.67 ft^3). I am not really sure what I can expect for the volume of air, for air being discharged at 40 psi for 1 minute through a 0.5 inch diameter pipe. Any help would be greatly appreciated. Thank you.