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1.Suppose in 100 years energy consumption is still 330 Ej/yr, but coal supplies only 20 percent of total demand, natural gas supplies 30 percent, and oil 10 percent. The remaining 40 percent of demand is met by noncarbon-emitting sources. What would be the carbon emission rate (Gt/yr)
2.A well of 0.4 m diameter fully penetrates a 25 m thick confined aquifer of coefficient of permeability of 12m/day. The well is located in the center of a circular island of radius 1 km. The water level at the boundary of the island is 80m. At what rate should the well be pumped so that the water level in the well remains 60 m above the bottom?
Submarines change their depth by adding or removing air from rigid ballast tanks, thereby displacing seawater in the tanks. Consider a submarine that has a 700m3 air-ballast tank originally partially filled with 100m3 of air at 1500 kPa and 15oC. For..
Consider an air bubble rising from the bottom of a lake. Neglecting surface tension, determine approximately what the ratio of the density of the air in the bubble will be at a depth of 34ft to its density at a depth of 8 ft
How to detect eror in line of collimation and what does line of collimation means.
What would the B/C ratio be if the light poles were twice as far apart as assumed above?
What is the largest circle that can be inscribed within a polygon with corner coordinates (600,800), (900, 300), (500, 100), and (100, 40) Find the radius of the largest circle and show how you found it from these coordinates.
The base engine develops 200 ft-lb of torque, and a modified version of the engine develops 240 ft-lb of torque. If the overall gear reduction ratio is 8 to 1, what is the maximum acceleration from rest (in ft/sec^2) for:
Construction dewatering plays are very large role in the todays construction arena. Discuss the role water conditions plays in the planning and design of a temporary earth support system.
The block is acted by its weight W=200 lb, a horizontal force Q=600 lb, and the pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the inclined thereby sliding the block up it. Determine P and R.
A simple supported beam 6m long is composed of two C200x28 channel RIVETED FRONT TO FRONT . What uniformly distributed load can be carried in addition to the weight of the beam w/o exceeding a flexural stress of 125MN/m^2
Argon in a light bulb is at 110kPa, 70 degrees celsius. The light is turned off, so the argon cools to the ambient 20 degrees celsius. Disregard the glass and any other mass and find the specific entropy generation
Follow the derivation of the following equations for deflections of a beam, filling in all the required assumptions and steps in the derivations.EIv'' = M EIv''' =V EIv'''' = ? q where v is the deflection of the beam, E is Young's modulus
A 14in diameter pipe pile is driven 50ft into a dry loose sandwhose unit weight is 105 pcf. The angle of internal frictionis 33 degrees. Compute the safe axial downward loading
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