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Two routes connect an origin-destination pair with performance functions t1 = 6 + 4x1 and t2 = 2 + 0.5x2 2 (with t's in minutes and x's in thousands of vehicles per hour). The origin-destination demand is 4000 veh/h at a travel time of 2 minutes, but for each additional minute beyond these 2 minutes, 100 fewer vehicles depart. Determine user equilibrium route flows and total vehicle travel time.
A parachutist is in free fall at a rate of 180 ft/s when he opens his parachute at an altitude of 1900 ft. Following a rapid and constant deceleration, he then descends at a constant rate of 44 ft/s from 1800 ft to 100 ft, where he maneuvers the p..
An antenna having an input impedance on transmission of 70+j30 ohms is used on reception by connecting directly to a 50 ohms transmission line which is perfectly matched to a pure resistance load.
Bearing stresses are very common in aerospace engineering. It occurs on the surface of contact between any two structural members. Bolts, pins, and rivets are classic examples of where bearing stresses occur.
Calculate the number of steps per second required to deliver fluid at the commanded rate taking into account the step angle of the motor, the gear reduction, the pitch of the drive screw moving the captive nut and finally the syringe calibration
Search the internet for the link to the Boston tunnel, "the Big Dig" or the "Channel Tunnel," and London's Millennium Dome. In spite of their poor cost performance, why do you think these projects were supported to their conclusion? What would it ..
A prismatically shaped gate placed at the end of a freshwater channel is supported by a pin and bracket at A and rests on a frictionless support at B. The pin is located at a distance 4 h = in. below the center of gravity C of the gate. Determine ..
Design a coal overburden throw/cast blast for the situation - Undertake a tunnel blast design for the conditions
A natural gas containing 82.0 mole% CH4 and the balance C2H6 is burned with 20% excess air in a boiler furnace. The fuel gas enters the furnace at 298 K, and the air is preheated to 423 K. The heat capacities of the stack gas components may be ass..
Determine the cross-sectional conducting area of this conductor in square meters - find the 60-Hz resistance of this conductor in ohms per kilometer at 50°C.
In a processing plant, a chemical tower has a liquid which is vaporized. However, if the vapor in the tower reaches 150°C, an alarm needs to be generated so that safe shutdown of that system of the plant may be initiated. An RTD will be used to me..
The coefficient of permeability is 0.31 m/day and the radius of influence of the well at that discharge is l000 m Determine and plot the drawdown curve for the well.
Consider a refrigeration system using refrigerant- 134a as the working fluid. If this refrigerator is to operate in an environment at 30°C, what is the minimum pressure to which the refrigerant should be compressed? Why?
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