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A solar collector design consists of an inner tube enclosed concentrically in an outer tube that is transparent to solar radiation. The tubes are thin walled with inner and outer diameters of 0.10 and 0.15 m, respectively. The annular space between the tubes is completely enclosed and filled with air at atmos- pheric pressure. Under operating conditions for which the inner and outer tube surface temperatures are 70 and 30°C, respectively, what is the convective heat loss per meter of tube length across the air space?
the wet feed material to a continuous dryer contains 50 wt water on a wet basis and is dried to 27 wt by countercurrent
Determine the diameter of the driven pulley and the approximate belt length if A) it rotates in the same direction at 450rpm B) it rotates in the opposite direction at the same speed
At that point, inlet flow rate wt is adjusted so that the level remains constant. However, on this particular day, corrosion of the tank has opened up a hole in the wail at a height of 1 m, producing a leak whose volumetric flow rate q4 (m3/min) c..
water vapor exists at a pressure of 10kpa and temperature of 373k. assume a reference atmosphere exists at to 298k and
piston having a diameter of 5.48 inches and a length of 9.50 in slides downward with a velocity v through a vertical
Water as a saturated vapor at a temperature of 300 °C undergoes the path of a linear change in of pressure with respect to volume until the final pressure is 6500 kPa and the final temperature is 600 °C. Show the process on a P-v diagram. Find the ..
what is the difference between steady state and non steady state diffusion procces? use mathematical expresions for
it is observed that when a regulation 20 ounce basketball is dropped from a height of 1.3m onto a floor it bounces back
Water at 74°F and 200 psi is heated by mixing it with superheated steam at 600°F and 200 psi in a constant pressure mixing chamber. If the mass flow rates of the water and steam entering the mixing chamber are equal, determine the temperature of the ..
a piston-cylinder device contains v1 volume of air at p1 pressure and t1 temperature. the air is now compressed to v2
The velocity field of a flow is given by V = (3y + 2)i + (x - 8)j + 5zk , where x, y, and z are in feet. Determine the fluid speed at the origin (x = y = z = 0) and on the y axis (x = z = 0). First, determine the fluid speed at the origin (x = y = z ..
A 10-lb block has an initial velocity of 10 ft/s on a smooth, horizontal plane. A force, F = (2.5 t) lb, where t is in seconds, acts horizontally on the block in its direction of motion. Determine an expression for the distance, s in terms of time, t
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