6. a pump operating at steady state draws water from a pond and delivers it through a pipe whose exit is 90 ft above the inlet. at the exit, the mass flow rate is 10 lbm/s. there is no significant change in water temperature, pressure, or kinetic energy from the inlet to the exit. if the power required by the pump is 1.68 hp, determine the rate of heat transfer between the pump and its surrounds in hp and btu/min. (g = 32.0 ft/s^2.)

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

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

The higher the astm grain size number, the finer the gran is. a)-true b)-false