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An ideal gas expands isentropically through a converging nozzle from a large tank at 120 lbf/in.2, 6008R, and discharges into a region at 60 lbf/in.2 Determine the mass flow rate, in lb/s, for an exit flow area of 1 in.2, if the gas is
(a) air, with k 5 1.4.
(b) carbon dioxide, with k 5 1.26.
(c) argon, with k 5 1.667.
a 40-mph wind below past your house speeds up as it flows up and over the roof.nbspif the elevation effects are
1. Determine the net electric power produced by the fuel cell-fan system, Pnet = P - Pf . 2. Consider the effect of attaching an aluminum (k = 200 W/m · K) finned heat sink, of identical top and bottom sections, onto the fuel cell body. The contact j..
If the coefficient of kinetic friction between the belt and a package is μk = 0.2, determine the time needed to bring the package to rest on the belt if the belt is moving in the same direction as the package with a speed v = 1 m> s.
thirty units were placed on test in order to estimate the reliability of the shift driver over a 200 operating hour
a centrifugal pump weighing 600 n and operationg at 1000 rpm is mounted on six springs of stiffness 6000 nm each. find
a power plant has an overall efficiency of 30. the plant generates 20mw of electricity and uses coal with a heating
air at 140 kpa and 27 degc is contained in the cylinder of a piston-cylinder device. at this initial position the
the 50-lb package starts from rest slides down the smooth ramp and is stopped by the spring. the coefficient of static
What tightening torque should be used if the connection is permanent and the fasteners are lubricated? What portion of the external load is taken by the bolts? By the members?
the state liquid water is changed from 50 pisa and 50 f to 200 pisa and 100 f. determine the change in the internal
Draw a sketch to show the basic design for preparing the edges of two 20-mm thick plates to be butt-joined by shielded metal arc welding with One sided access
Comment on the importance of quickly returning the milk carton to the refrigerator from an energy con- servation point of view.
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