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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?
Describe some of the benefits of physical models and mock-ups. What data are required to measure the following cost-effectiveness, system effectiveness, operational availability, and life-cycle cost?
A spherical tank is being designed to hold 7 moles of methane gas at a pressure of 8 bar and a temperature of 50oF. Determine the volume of the spherical tank to be used.
Terry wants to purchase a used car for $8000. The dealer offered to finance the deal at 8.5% APR for 4 years with 10% down payment. Terry's bank will provide a loan at 7.8% for 3 years, but wants a 20% downpayment.
what is the second year book value for equipment with an initial cost of $11,000, a salvage value of 1,000 and a recovery period of 5 yrs for A. straight line depreciation. B. Double declining balance. C. MACRS
When a particle falls through the air, its initial acceleration a=g diminishes until it is zero, and thereafter it falls at a constant or terminal velocity v_f . If this variation of the acceleration can be expressed as a=(g/v^2_f)(v^2_f-v^2)
The interaction that occurs between a system and its surroundings as the system executes a process, which is the result of the system being at a temperature different from that of the surroundings.
Traffic data collected at the same time indicated an average time headway of 4 sec. Determine the (a) density on the highway (b) flow on the road (c) space mean speed.
The overpass structure is to be level, centered 26 feet above the railroad, and 180 feet long. How much existing highway (in feet) must be reconstructed to provide appropriate vertical alignment
Air photos are taken with specified overlap to take advantage of image parallax. Calculate the time interval between air photo exposures if the ground speed of the aircraft is 160km/h, the focal lenght is 50mm
Assume that theta is given in degrees, and write the MATLAB statements to evaluate tan(theta) as long as the magnitude of cos( theta) is grater than or equal to 10^(-20). If the magnitude of cos(theta) is less than 10^(-20)
Find the settling velocity of a 20 µm diameter particle with density 1500 kg/m3. If this particle had been hurled to a height of 8,000 m during a volcanic eruption, estimate the time required to reach the ground
When filled to capacity, avertical cylindrical un-pressurized storage tank contains water to a height of 14.5m above its base. Given that the height of the tankis 15m, the diameter 9m and wall thickness 18mm
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