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At a given radial location, a 15-mph wind against a windmill (see Video V12.1) results in the upstream
(1) and downstream
(2) velocity triangles shown in Fig. P12.8. Sketch an appropriate blade section at that radial location and determine the energy transferred per unit mass of fluid.
The soil in a polder consists of a clay layer of 5 meter thickness, with a porosity of 50 %, on top of a deep layer of stiff sand. The water level in the clay is lowered by 1.5 meter. Experience indicates that then the porosity of the clay is redu..
calculate the vortexshedding frequency and the distance between two shedding cycles. If the intention is to have the same frequency as in full scale, then what is the desirable air speed in the wind tunnel?
a vessel of volume v 6 liters contains water along with its saturated vapor under a pressure of 40 atmospheric and a
the united states is currently considering standards to generate 20 of its electricity from renewable resource in the
determine the instantaneous rate of heat transfer from a 1.5-cm-diameter ball bearing with a surface temperature of 150
a 50 cm long 800 w electric resistance heating element with diameter .5 cm and surface temperature 120c is immersed in 60 kg of water temperature to 80c. also determine the convection heat transfer coefficients at the beginning and at the end of t..
Derive theoretical absorbance values (1.00-cm cells) for each solution and plot the data for (a) 345 nm, (b) 370 nm. and (c) 400 nm.
In the casting of steel under certain mold conditions, the mold constant in Chvorinov's Rule is known to be 4.0 min/cm2, based on previous experience. The casting is a flat plate whose length = 35 cm, width = 10 cm, and thickness = 15 mm. Determine h..
air at 10 deg c and 80 kpa enters the diffuser of a jet engine steadily with a velocity of 200 ms. the inlet area of
An engine block with a surface area measured to be 0.90m2 generates a power output of 55 kW with a net engine efficiency of 35%. The engine block operates inside a compartment at 157oC and the average convection heat transfer coefficient of 60 W/m..
The concentration of a metabolite within the bloodstream is 100 parts per million. Assume that 1000 mg of metabolite is to be used as a tracer, it is injected over 5 min and the downstream concentration is measured to be 4000ppm.
an insulated rigid tank is divided into two chambers by a membrane. chamber a has a volume of 3 ft3 and intially
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