Engineering, 23.04.2020 15:24 thefandomarmy24
A line of traffic moving at 30 mi/h and a concentration of 50 veh/mi is stopped for 30s at a red light. Calculate
(a) the velocity and direction of the stopping wave
(b) the length of the line of cars stopped during 30s of red, and
(c) the number of cars stopped during the 30s of red. Assume a jam concentration of 250 veh/mi.
Answers: 2
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Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
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Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.
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Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
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A line of traffic moving at 30 mi/h and a concentration of 50 veh/mi is stopped for 30s at a red lig...
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