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A 1/4 scale model of a tractor trailer is tested in a wind tunnel under standard sea level conditions. The model frontal area is 6.75 ft^2 . Determine the air speed at which the model should be tested to ensure dynamically similar results if the highway speed of the prototype rig is 55mph. When tested at this airspeed, the measured drag force is 784lb. What is the drag coefficient of the model? Also calculate the Drag force on a prototype tractor trailer at a highway speed of 55 mph.
air flows along a horizontal curve streamline with a curve 20 ft raduis with a speed of 100fts. determine the pressure
two jets of air of equal mass flow rate mix thoroughly before entering a large reservoir. one jet is at 400 k and 100
the collars are pin connected at b and are free to move along rod oa and the curved guide oc having the shape of a
a garden hose is open at one end and capped closed at the other. a swimmer in an above-ground pool fills the hose
ten kilograms of water initially at 3000 kpa 200degc are contained in a piston-cylindernbspdevice shown below. a
consider the incompressible-flow field u ax by v cx dy w 0. for what conditions on constants a b c d is this flow
a tank of 50 ft3 volume contains saturated ammonia at a pressure of 200 lbfin2. initially the tank contains 50 liquid
a heat engine operates in a carnot cycle between72.0degc and345degc. it absorbs21600j of energy per cycle from the hot
initially an insulated rigid tank contains 15.65 kg of water at 24.16oc and 101 kpa. the tank also contains a 3.12 kg
Knowing that the coefficient of restitution is 0.8 between B and C, and 0.5 between A and B, Determine the velocity of each car after all collisions have taken place.
ethanol c2h5oh is burned with air in a sie with a fuel-rich mixture. consider mon 89 and ron 107 for this fuel.
a piston-cylinder device initially contains 1.2 kg of steam with a volume of 0.2 m3. the mass of the piston is such
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