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Consider a 0.25-m-long vertical plate that is at 70°C. The plate is suspended in quiescent air that is at 25°C. Estimate the velocity boundary layer thickness and maximum upward velocity at the trailing edge of the plate. How does the boundary layer thickness compare with the thickness that would exist if the air were flowing over the plate at a free stream velocity of 5 m/s?
it is known that normal stress sigma-y 68mpa and shear stress tau-xy -100mpa. using mohrs circle determine the
A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..
A cube of linear elastic material is subjected to a vertical compressive stress sigma1 in the 1-direction, but it is now constrained ( e = 0) in both the 2- and 3- directions. Find expressions for the induced transverse stresses, sigma2 and sigma3 in..
pure aluminum is poured into a sand mold. the metal level in the pouring basin is 10 in. above the metal level in the
Refrigerant 134a at a flow rate of 0.5 lb/s enters a heat exchanger operating at steady state as a saturated liquid at 0 0F and exits at 20 0F. A separate air stream enters at 120 0F and exits at 77 0F. The heat exchanger is insulated such that there..
With a proper sequence of thermal processing, aluminum alloyed with 4% copper can be caused to contain a large number of very small particles of the hard intermetallic compound CuAl2. How would you expect the yield strength of such processed alloy to..
during calcination of limestone calcium carbonate is decomposed into lime and carbon dioxide. the rate of calcination
for a 6000 square feet combination gym and exercise if is desire to reduce outdoor air intake to a minimum by filtering
A conditioned space has a latent load of 12,000 Btu/hr and a sensible load of 20,000 Btu/hr. The space is to be maintained at 75 deg F, 40% rh. Determine the required flow rate of air through the chiller in CFM, and the humidity ratio of the supply a..
Liquid water at 200 kPa and 20 C is heated in a chamber by mixing it with superheated steam at 200 kPa and 150 C. Liquid water enters the mixing chamber at a rate of 1.3 kg/s, and the chamber is estimated to lose heat to the surrounding air at 25 C a..
problem 1heat is being generated uniformly throughout a sphere at volumetric rate 4. the radius of the sphere is r and
a cylinder contains 2 kg of steam at 200 kpa and 200oc. now steam is compressed at constant pressure until its
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