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A rectangular casting having the dimensions 3 inch by 5 inch by 10inch solidifies completely in 11.5min.Using n=2 in 2 in Chvorinov's rule, calculate the mold constant B. Then compute the solidification time of a 0.5inch by 8inch by 8inch casting poured under the same conditions?
A horizontal platform rests on four vertical springs, each of stiffness 15kN/m and mass 0.25kg. what will the frequency of oscillation of the table be if it has a mass of 2.okg
in hydroelectric power plant water at 20 celcius. is supplied to turbine at a rate of 0.6m3s through 200m long
a 1-kg disk slides on a smooth horizontal table and is attached to a string that passes through a hole in the table.a
What will be his highest elevation? If his jump angle is increased to 30deg, will he stay in the air longer? Is his horizontal jump longer? Is this vertical maximum higher?
the drag on a 2-m. diameter satellite dish in an 80 kmhr wind is to be determined by a wind tunnel test using a
superheated steam at 8 mpa and 480oc leaves the steam generator of a vapor power plant. heat transfer and frictional
Question about Turbomachinery - Impulse & Reaction Turbines, An impulse air turbine rotor with a blade speed (U) of 300 m/s is measured to have a relative rotor inlet velocity (W_1) of 750 m/s at an angle of 69 degrees and an outlet relative veloc..
a two-phase liquid vapor mixture of water has a temperature of 300 c and a quality of 75. the mixture occupies a volume
a light fixture holds two lightbulbs. bulb a is of a type whos lietime is nomally distributed with mean 800 hours and
many commercial sinks and publicly-accessible showers have mixing valves underneath them which pre-mix the hot and cold
An airplane weighing 70000 lb is in a cruise flight (constant altitude, constant velocity, level flight) at an altitude of 30000 ft, with a velocity of 0.5 Mach. Its wing area is 4000 ft2. Given the drag polar of the airplane as CD=CD,0+0.05CL2; CD,0..
a conical hole is machined in a metal whose emissivity is 0.5. the hole is 2.5 cm in diameter at the surface and 7.5 cm
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