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A central heating system has a 60 W fan used to circulate air through the building ducts. A previous flow analysis showed that the fan needs to raise the air pressure by 50 Pa to maintain proper flow through the ducts. The fan is located in a horizontal section of circular duct whose diameter is 30 cm at both the inlet and outlet. Determine the highest possible average flow velocity in the duct.
a system that operates in a reversible cycle receives energy by heat transfer from a 24.8oc reservoir at a rate of 25.5
question 1consider the figure below which shows the energy-band splitting of silicon. if the equilibrium lattice
a crate in the back of a truck with an open tailgate has impending sliding as the truck accelerates from rest to 60 mph
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
a chemical rocket is used for launch into earth orbit. at the end of the combusion chamber the stagnation temperature
a flu epidemic starts by one infected person in an isolated population of n individuals. the rate at which the flu
For integrated circuits, Al lines are commonly placed on Si to act as electrical conductors between different parts of the device. Assuming that the Al is deposited at a temperature of 300oC, determine the CTE (Coefficient of Thermal Expansion) misma..
a flashlight is powered for 30 minutes by a 9-v battery supplying power at 0.5 amps.a find the resistance of the
A group of mechanical engineers like catamaran sailing on the Great Salt Lake and decide to use a glass-fiber reinforced composite with a high fiber fraction for a new boat design. The composite is 60 volume % SiO2 glass fibers and the remainder is a..
consider a three stage compression process with intercooling and determine the intermediate pressures that minimize the
a a material that you are working with has a band gap of 4 ev but it is opaque doesnt transmit light because it
consider an ideal steam reheat cycle in which the steam enters the high pressure turbine at 600 psi and 700f and then
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