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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 composite wall is to be constructed of 14 inch stainless steel k10.5 buthr-ft-degrees f 3.0 inches of corkboard
a 1 foot square 14 inch thick piece of oak floats in a large pool of water. the convective heat transfer coefficients
the inside surface of an 8-in-thick common brick wall is maintained at 100 f. thermal conductivity of th brick is 1.0
a belt drive is desire to couple the motor with a mixer for processing corn syrup. the 10-hp electric motor is rated at
wind drag can be approximated as being quadratic in speedfd av2where a is a scaling constant and v is the relative
a steam power plant implements an ideal reheat rankine cycle. steam enters the inlet of the high-pressure turbine at 8
one cubic foot 1 ft3 of air is contained in a piston - cylinder arrangement. the axis of the cylinder is oriented in
if silcion is cooled quickly it will form glass instead of crystallyzingone way to do this is to deposit si atoms onto
1 water flows through a 45 ft pipe with a 0.5 in diameter at a flow rate of 5 gpm. what facrtion of this pipe can be
What is the mass of oxygen gas in a container with a volume of 25 ft3, at a pressure of 14.7 psia and a temperature of 75oF?
The Acme Company claims to have designed an adiabatic turbine that will produce 126.2 BTU per pound of steam. The operating conditions are labeled on the diagram below. Is this company's claim valid or is this a perpetual motion machine? Hint: Determ..
Three springs and a mass are attached to a rigid, weightless bar PQ. Find the equation of motion and the natural frequency of vibration of the system.
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