To what head of air (R= 287J/kgK) at an absolute pressure of 101.3kPa and temperature of 15deg. C is a pressure of 75mm of water equivalent? Select one:
O a. 60.98m
O b. 65.33m
O c. 58.28m
O d. 62.58m

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?