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1. The plate described in Problem 9.14 has been used in an experiment to determine the free convection heat transfer coefficient. At an instant of time when the plate temperature was 127°C, the time rate of change of this temperature was observed to be -0.0465 K/s. What is the corresponding free convection heat trans- fer coefficient? Compare this result with an estimate based on a standard empirical correlation.
2. Determine the average convection heat transfer coeffi- cient for the 2.5-m-high vertical walls of a home having respective interior air and wall surface temperatures of (a) 20 and 10°C and (b) 27 and 37°C.
A centrifugal compressor has an impeller tip speed of 366 m/s. Determine the absolute Mach number of the flow leaving the radial vanes of the impeller when the radial component of the velocity at impeller exit is 30.5 m/s and the slip factor is .9. G..
although ripening of tomatoes can be retarded by low temperatures storage under refrigeration can cause chilling injury
Calculate the force required to push liquid oil, with the density of 890 kg/m^3, through a 1 mm diameter hole. Account for viscous forces and please show all work.
air enters at 75 psi 400 f and 100 fts and area at inlet is 20 in2. at outlet 15 psi 500 fts. find m dot and
suppose that 1 kg of saturated water vapor at 100ordmc is condensed to a saturated liquid at 100ordmc in a
Compute the fugacities of ethane and n-butane in an equimolar mixture at 373.15K at 1, 10, and 15 bar total pressure assuming that the Lewis-Randall rule is correct.
Design a box that will contain a 4 in. x 6 in. x 3 in. volume. The box should be produced from two pieces of sheet metal and require no tools or fasteners for assembly. Repeat the problem, but design the box from a single sheet of metal.
Compute the pressure at the base of the tank? Show your work. Compute the force on one of the walls exerted by the air, gasoline and water. Show your work.
a 517-kg cannon fires a 16.5-kg projectile with a speed of 265 ms with respect to the muzzle. the cannon is on wheels
Gas streams containing hydrogen and nitrogen in different proportions are produced on request by blending gases from two feed tanks: Tank A (hydrogen mole fraction = xA) and Tank B (hydrogen mole fraction = xB). The requests specify the desired hy..
a suppose the sound pressure level at a distance of 100 m from a single wind turbine is 55 db. what is the sound power
the populatoin p of a small community on the outskirts of a city grows rapidly over a 20-year periodt 0 5 10 15 20p 100
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