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A vertical jet of liquid of diameter d and moving at velocity u∞ impinges on a horizontal disk rotating ω rad/s. There is no heat transfer in the system. Develop an expression for δ(r), where r is the radial coordinate on the disk.
Contrast the r dependence of δ with that of a condensing film on a rotating disk and explain the difference qualitatively.
plastics and other polymeric materials are expensive with respect to steel and are usually more costly than aluminum
Assuming the surroundings are at 25?C find the actual heat transfer and the irreversibility in the process.
Air at atmospheric pressure and a temperature of 25°C is in parallel flow at a velocity of 5 m/s over a 1m long flat plate that is heated with a uniform heat flux of 1250 W/m2. Assume the flow is fully turbulent over the length of the plate.
an iron blok m1kg initialy held stationary is dropped form a 100 m height. it strikes the groud and is assumed to be
a piston-cylinder contains 1.2 kg of saturated water vapor at an initial temperature of t1 200 oc.
Compute the horizontal deflection of joint B. Sketch the deflected shape. Note. that I is given in units of in4; E is constant and equals 30,000 kips/in2.
Compute the sample mean, sample variance, and sample standard deviation
A fan with a diameter of 12 inches operates at a voltage of 120V with a current draw of 0.5 amps. The manufacturer claims the average velocity of air leaving the fan is 33.1 ft./s under standard conditions. Standard air has a density of 0.075 lb mass..
Assume the van der Waals equation of state holds for the n-propane molecule (C3H8). Find values for the constants a and b (online) and use these to calculate the density in (g ml^-1) at a temperature of 1000K and a pressure of 10 atm. The equation or..
a piston-cylinder device initially contains 0.07m3 of nitrogen gas at 130kpa and 120 degrees celsius. the nitrogen is
a steel rod of 4m length is attached at both ends at 30 degree c. the coeff of thermal expansion is 11 10-6 and moe
End A of a slender, uniform rod of length L and weight W bears on a surface as shown, while end B is supported by a cord BC. Knowing that the coefficients of friction are µs = 0.40 and µk = 0.30,
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