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Pressurized water (p_in = 10 bar, T_in = 110 deg C) enters the bottom of an L = 10-m-long vertical tube of diameter D = 100 mm at a mass flow rate of 1.5 kg/s. The tube is located inside a combustion chamber, resulting in heat transfer to the tube. Superheated steam exits the top of the tube at p_out = 7 bar, T_out = 600 deg C. Determine the change in the rate at which the following quantities enter and exit the tube: (a) the combined thermal and flow work, (b) the mechanical energy, and (c) the total energy of the water. Also, (d) determine the heat transfer rate, q. Hint: Relevant properties may be obtained from a thermo text.
problem a tension link shown to the right is used in earth-moving equipment and is subjected to cyclic stresses varying
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What load P allow can be supported at the midpoint of the bar if the yield stress in the steel wires is 220 MPa and in the aluminium wire is 80 MPa? A saftey factor of n = 2 is needed.
As shown, a 150 lb bungee jumper wants to jump from the top of a 630 ft high bridge and be able to just touch the water below. Given that the bungee cord has a spring constant of 108 lb/ft, what should the bungee cord's relaxed length, l, be for t..
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