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A certain lake is proposed as a landing area for large jet aircraft. The touchdown speed of 100 mi/hr upon contact with the water is to be reduced to 20 mi/hr in a distance of 1500 ft. If the deceleration is proportional to the square of the velocity of the aircraft through the water, a = Kv2, find the value of the design parameter K, which would be a measure of the size and shape of the landing gear vanes that plow through the water. Also find the time t elapsed during the specified interval.
In a motorcycle race on a straight track, the speed v of a motorcyclist at the d=200m mark is recorded. Given that the rider started from rest, find the initial acceleration of the motorcycle.
Estimate the fatigue strength of a rotating-beam made of AISI 1035 CR steel corresponding to a life of 10^5 cycles of stress reversal. Also, estimate the life of the specimen corresponding to stress apmlitude of 60 ksi.
Steam at 550 degree Celsius, 17.5 MPa enters the high-pressure turbine of an ideal reheat Rankine cycle. The steam exits the high-pressure turbine at 2 MPa, is reheated to 550 degree Celsius, and then expanded through a low-pressure turbine
Design an R.C.C. stair located in a stair-case hall measuring 2.5 m x 5.5 m. The vertical distance between the floors is 4 m. Draw a dimensional plan and section of the proposed stair.
A lagoon with volume 1200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply.
What are the two principle factors influencing the allowable bearing pressure in the design of a specific footing- Are both of these factors equally important? Are both factors likely to be equally relevant for different soils types
A beam that is part of a rigid frame has end moments and mid-span moments for dead, live, and earthquake loads shown below. Determine the governing load combination for both negative and positive moments
Which is not a factor to consider in software evaluation
The compressive strength of concrete has a (population) mean of 2500 psi and a (population) standard deviation of 50 psi. Find the probability that a random sample of n= 5 specimens will have a sample mean strength
Define flow at a hydraulic jump (upstream and downstream) in terms of the types of flow and corresponding Froude number. What is the depth of water at each section (upstream and downstream) compared to critical depth?
A completely mixed activated-sludge plan is being designed for a wastewater flow of 3.0 mgd. The BOD of 225 mg/l is 200 mg/l soluble. The effluent soluble BOD requirement is 7 mg/l (70 percent of the total 10 mg/l).
A passenger car being driven on a flat and straight section of a highway at a speed of 65 mph reaches a curved section of the highway with a grade of 5% and a radius of 1,500ft.
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