Amultiple disk clutch, steel on bronze, is to transmit 4.5 hp at 710 rpm. the inner radius of contact is 1.0 in, and the outer radius of contact is 2.6 in. the clutch operates in oil with an expected coefficient of friction 0.125. the average allowable pressure is 47 psi, maximum. assuming uniform wear, determine the followings: a. how many total disks of steel and bronze are required? b. what axial force is required? c. what is the average pressure? d. what is the actual maximum pressure?

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