A 6.85 in pump running at 3500 r/min has the following measured performance for water at 20C. Q, gal/min 50 100 150 200 250 300 350 400 450H, ft 201 200 198 194 184 181 159 156 139% 29 50 64 72 77 80 81 79 74 Estimate the horsepower at BEP. If this pump is rescaled in water to provide 20 bhp at 3000 r/min determine the approtiate (b) impeller diameter, (c) flow rate, and (d) efficiency for this new condition

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

Abarometer contains mercury with a density of 13600 kg/m3. atmospheric conditions are 95.8 kpa and 20 °c at 20 °c, the vapor pressure of the mercury is 0.000173 kpa. the column of mercury will rise to a height of most nearly. select one: a)- 0.38 m b)- 0.82 m c)- 0.48 m d)- 0.72 m