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The chief engineer of an airport is planning to rehabilitate runway pavements over the next several months. You ask him what impact this would have on delays and queues, but he does not know. Being a smart Georgia Tech student in CEE 3000, you realize immediately that this phenomenon could be modeled using a simple queue analysis. You figure out that airplanes arrive at the airport an average rate of 1 plane per 10 minutes, and that the arrival pattern could be assumed to follow the Poisson distribution. The airport control tower processes airplanes in their order of arrival. You also figure out that the service time could be assumed to follow the exponential distribution. If the service rate is 10 landings per hour, calculate the following parameters. Please use units of minutes for time-containing answers.
A) The average number of airplanes in the system (i.e. in the system and in the queue).
B) The average number of airplanes awaiting clearance to land.
C) The average time an airplane spends in the system.
D) The average time an airplane spends in the queue.
E) The probability that there is no airplane in the system.
(a) Describe the following types of Fe-C martensites that occure in plain-carbon steels: (i) lath martensite, (ii) plate martensite. (b) Describe some of the characteristics of the Fe-C martensite transformation
The maximum specific growth rate of the organisms driving this reaction is 5.0 days -1 and the growth rate is 0.54 day-1. The activated sludge tank has a volume of 40 m3 and the flow rate into it is 400 m3/day.
If the car passes point A with a speed of 20m/s and begins to increase its speed at a constant rate of At=0.5m/s^2, determine the magnitude of the car's acceleration when s=100m and x=0.
Properties of frozen tissues have been measured as part of understanding the response of tissue to cryopreservation. In one set of experiments, frozen bovine carotid arteries were tested in uniaxial tension.
The flow through an 8 ft. Parshall Flume is 129 cfs when Ha is 2.50 ft. Determine the downstream water level (Hb) that would produce this flowrate.
a hollow rectangular masonry pier 600mm900mm and 150mm thick transmits a vertical load of 500knnbspin a vertical plane
Briefly describe electron and hole motions in a p-n junction for forward and reverse biases;
a) What was the discharge capacity andvelocity at full flow at the time of installation b) If the pipe presently carries a flow of15 cfs when full, determine the present velocity and present value of n.
A steel tube has an outside diameter of 2.5 inches and an inside diameter of 2.375 (1/8" thick). If it transmits 35 hp when turning at 2700 rpm, what is the maximum shear stress
What is the length of a 2 degree increment along a (A) meridian and (B) parallel at 45N and 115W. Assume the radius of Earth is 6370 km.
A steel shaft with a diameter of 40mm and length of 1.1m transmits 60hp from an electric motor to a compressor. If the allowable shear stress is 50MPa and the allowable angle of twist is 1.5 degrees
Assume frictionless flow in a long, horizontal, conical pipe. The diameter is 12 inches at one end and 6 inches at the other. The pressure head at the smaller end is 16 feet of water.
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