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A fan with a diameter of 12 inches operates at a voltage of 120V with a current draw of 0.5 amps. The manufacturer claims the average velocity of air leaving the fan is 33.1 ft./s under standard conditions. Standard air has a density of 0.075 lb mass per feet cubed. Is the manufacturer's claim valid? What is the efficiency of this fan/motor system?
an air conditioner using r-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle
a partially full can of soft drink is placed at the outer edge of a childs merry-go-round located r 1.5 m from the
a mixture of 1 mol of h2o 2 mol of o2 and 5 mol of n2 is heated to 2200 k at a pressure of 5 atm. assuming the
Describe on your own words the three strengthen mechanism for metals (i.e. grain size reduction, solid solution strengthening and strain hardening). Be sure to explain how dislocations are involved in each of the strengthening techniques.
a free piston-cylinder system initially contains 8 kg of saturated liquid water at 275 kpa initial state. the water in
Knowing that crank AB rotates about point A with a constant angular velocity of 900 rpm clockwise, determine the acceleration of the piston P when θ = 120°.
a car moves along a straight line starting from rest with an acceleration of 5 fts2 for 6 seconds then brakes with a
a tank contains 1 m3 air at 100 kpa 300 k. a pipe flowing air at 1000 kpa 300 k is connected to the tank and it is
a stainless steel tube of 1 cm outer diameter and 1mm wall thickness receives a uniform radiative heat flux of 100 wcm2
a roughing section of a broach is to remove stock 3.2 mm deep from a steel surface205 mm long x 50 mm wide each tooth
a 1200 mwe pressurized water reactor pwr with an overall thermal efficiency of 30 is designed to supply saturated steam
air enters the compressor of a cold air-standard brayton cycle at 100 kpa 300 k with a mass flow rate of 6 kgs. the
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