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1.Select the lightest W-section for column A in the unbracedframe to carry an axial load of 60 kips dead load and 220 kips liveload. Use A992 steel (Fy=50ksi). In the plane perpendicular to theframe, the system is braced with supports at the top and bottom.Use stiffness reduction factor τ to determineeffective length k.
2.A completely reversible heat engine operates with a source at 1500 R and a sink at 500 R. At what rate must heat be supplied to this engine, in Btu/h, for it to produce 5 hp of power?
3.It is estimated that 60% of the annual precipitation in a basin with a drainage area of20,000 acres is evaporated. If the average annual river flow at the outlet (runoff) is 2.5 cfs, determine the annual precipitation in the basin. Assume seepage and transpiration are negligible and there is no storage.
A stream conveying a flood peak of 50 m3/s (velocity 1.25 m/s and depth 1 m) is divided into 1 km long reaches for solution of the unsteady equations. Determine the largest value of ft for which the solution will be stable.
Air at 14.7 psia, 55*F, 60 percent relative humidity is first heated to 72*F in a heating section and then humidified by introducing water vapor. The air leaves the humidifying section at 75*F and 65 percent relative humidity.
Verify that the displacement response of the system - single-degree-of-freedom model below is subject to the pulse loading
Calculate the numbers of married men, single men, married women and single women. Print these numbers on a student summary report. If any single men are over 30 years of age, print their names and ages on a separate eligible bachelors report.
The aluminum block has a rectangular cross section and is subjected to an axial compressive force of 8kip. If the 1.5-in side changed its length to 1.500132 in., Determine Poisson's ratio and the new length of the 2-in side.
A blimp is approximated by a by a sphere of 25 m in diameter. Estimate the weight of 15°C gas within the blimp for (a) helium at 1.1 atm; and (b) air at 1.0 atm. What might the difference between these two values represent
If intake1=0m and intake2=0.5m, find the pressure required to fill the container when h=0.75m at both point 1 and 2. Assume the air is at atmospheric pressure until the water level passes intake 2 and the air follows isothermal compression.
Maximum shear stress both in the tube and sleeve is 16000 psi. Calculate the fluid pressure, and determine the pressure between the sleeve and cylinder when the fluid pressure is absent.
A train of total mass equal to 500 Megagrams starts from rest and accelerates uniformly to a speed of 90 km/h in 50 s. After reaching this speed, the train travels with a constant velocity.
It is required to dewater a construction site 80 m by 80 m. The bottom of the construction will be 1.5 m below the initial water surface elevation of 90 m.
A tracer study was conducted to assess groundwater velocity and showed that a slug of a conservative tracer took 34 days to travel the 10-m distance between two wells.
An electron is released from rest at a perpendicular distance of 9.9 cm from a line of charge on a very long nonconducting rod. That charge is uniformly distributed, with 9.0 ?C per meter. What is the magnitude of the electron's initial accelerati..
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