10. If a pump discharges 90 GPM of water whose specific weight is 61.5 lb f /ft 3 (g = 31.95 ft/s 2 ), find a) mass
flow rate (lb m /min), b) time to fill a spherical tank 8 ft in diameter.
There are in a gallon
Therefore, the volume flow rate can be expressed as
We can multiply that by the density of 62.4 lbm/ft^3
Mass flow rate = 626 LBM/min