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A weir is an obstruction in a channel flow that can be calibrated to measure the flow rate, as in Fig. P5.32. The volume flow Q varies with gravity g, weir width b into the paper, and upstream water height H above the weir crest. If it is known that Q is proportional to b, use the pi theorem to find a unique functional relationship Q(g, b, H )
a piston-cylinder device contains 0.15kg of air initially at 2mpa and 350oc. the air is first expanded isothermally to
In a thin-walled cylinder loaded with internal pressure, show how a single-element strain gage in hoop direction can be used to established the hoop and axial stresses.
40-m long section of a horizontal steam pipe of 6-cm in outside diameter has a surface temperature of 170c and
hot exhaust gases carbon dioxide are cooled from 700 k to 300 k isobarically at 500 kpa. the cooling fluid is
What are the rules that must be kept in mind while designing castings?
calculate the average density of an interply hybrid beam containing m layers of im7 carbon fiber- epoxy and n layers of
the upside-down steel a frame shown in the figure is to be bolted to steel beams on the ceiling of a machine room using
consider a 12-cm-thick plane wall with its inner surface temperature fixed at 0 degrees celsius. when its outer surface
A geothermal pump is used to pump brine whose density is 1050 kg/m3 at a rate of 0.3 m3/s from a depth of 200 m, For a pump efficiency of 74 percent, determine the required power input to the pump.
---a heat engine operates between two heat reservoirs with temperature of 560 and 280 k. the thermal efficiency of the
oil enters a counterflow heat exchanger at 450k with a mass flow rate of 10 kgs and exits at 350k. a seperate stream of
a 2000kg weight is at the top of a 20m tower. the weight falls by pulley system and transfers all of its energy to a
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