Air is blown through a large wind tunnel by a 5m diameter circular fan. if the air velocity just downstream of the fan is 2.5m/s, what will be its velocity at a 1.5m square section further down the wind tunnel? a7 [2] a) 18.3m/s 17.4m/s b) 2.5m/s 250m/s 21.81m/s

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)

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

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