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question a 02 m times 02 m street sign surface has an absorptivity of 06 and an emissivity of 07 solar radiation is
question consider a 12-m-high and 2-m-wide glass window with a thickness of 6 mm thermal conductivity k 078 wmk and
question consider a 2-ft times 2-ft thin square plate in a room at 75degf one side of the plate is maintained at a
question a 05-m-long thin vertical copper plate is subjected to a uniform heat flux of 1000 wm2 on one side while the
question a 10 cm times 10 cm plate has a constant surface temperature of 150degc determine the grashof number if the
question electronic boxes such as computers are commonly cooled by a fan write an essay on forced air cooling of
question design a heat exchanger to pasteurize milk by steam in a dairy plant milk is to flow through a bank of
question oil at 15degc is to be heated by saturated steam at 1 atm in a double-pipe heat exchanger to a temperature of
question a geothermal district heating system involves the transport of geothermal water at 110degc from a geothermal
question cold air at 5degc enters a l2-cm-diameter 20-m-long isothermal pipe at a velocity of 25 ms and leaves at
question hot water at 90degc enters a 15-m section of a cast iron pipe k 52 wmk whose inner and outer diameters are 4
question a silicon chip is cooled by passing water through micro channels etched in the back of the chip as shown in
question repeat problem for a flow rate of 20 kgsproblem water is heated at a rate of 10 kgs from a temperature of
question to cool a storehouse in the summer without using a conventional air-conditioning system the owner decided to
question water is heated at a rate of 10 kgs from a temperature of 15degc to 35degc by passing it through five
question consider laminar flow of a fluid through a square channel maintained at a constant temperature now the mean
question the velocity profile in fully developed laminar flow in a circular pipe in ms is given by ur 61 - 100r2 where
question hot exhaust gases leaving a stationary diesel engine at 450degc enter a l5-cm-diameter pipe at an average
question reconsider problem calculate the fully developed friction coefficient if the volume flow rate is increased by
question hot air at atmospheric pressure and 85degc enters a 10-m-long uninsulated square duct of cross section 015 m
question a 4-m-long tube is subjected to uniform wall heat flux the tube has an inside diameter of 00149 m and a flow
question ethylene glycol-distilled water mixture with a mass fraction of 072 and a flow rate of 205 times 10-4 m3 s
question a computer cooled by a fan contains eight printed circuit boards pcbs each dissipating 10 w of power the
question consider the flow of oil at 10degc in a 40-cm-diameter pipeline at an average velocity of 05 ms a 1500-m-long
question liquid glycerin is flowing through a 25-mm-diameter and 10-m-long tube the liquid glycerin enters the tube at