Atransmission shaft, rotating at 500 rpm drives a milling machine which requires 3.75 kw at 750 rpm. a 300 mm diameter cast iron pulley is mounted on the transmission shaft. a preliminary design proposes using a belt of 4.75 mm thickness, which has a density of 970 kg/m². the allowable stress is 2 mpa. two pulleys rotate in opposite directions and the centre distance of the shafts is 750 mm. the co efficient of friction is 0.3 for both the pulleys. determine the width of the belt.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)