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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.
an electric moter drivers an axial fan assuming that the desired air velocity 65degree f existing the fan is 50mph and
a piston-cylinder device contains 6 kg of h2 and 21 kg of n2 at 160 k and 5 mpa. heat is now transferred to the device
Gasoline is unloaded from a tanker truck through a 4 inch diameter rough-surfaced hose. This is a "gravity dump" with no pump to enhance the flow rate. It is claimed that the 8800 gallon capacity truck can be unloaded in 28 minutes. Do you agree? Sup..
mechanical vibrations a helical spring of stiffness k is cut into two halves and a mass m is connected to be 0.5 s. if
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calculate the radius of an silver atom in cm given that ag has an fcc crystal structure a density of 10.5 gcm3 and an
Calculate the force per unit length exerted by the y > 0 half of the cylinder on the y
the following data apply to the auxiliary power unit apu on the boeing 777 single shaft unit driving seperate load
as a committed olympic weightlifter you bring alonf a barbell on your campaign trip. each end of the bar carries a mass
a certain hydraulic system operates at 20.0 mpa. compute the percentage change in the volume of the oil in the system
Determine the entropy generation during the process on the basis of 1 mole of ethane.
a rigid closed tank of volume 3 m3 contains 5 kg of wet steam at a pressure of 200 kpa. the tank is heated until the
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