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An energy efficiency project has a first cost of $300,000, A life of 10 years, and no salvage value. Assume that the interest rate is 9%. The most likely value for annual savings is $60,000. The optimistic value for annual savings is $80,000 with a probability of 0.2. The pessimistic value is $40,000 with a probability of 0.3. a) What is the expected annual savings? b) The expected PW?
Three prismatic bars, two of material A and one of material B, transmit a tensile load P. The two outer bars (material A) are identical. The cross-sectional area of the middle bar (material B) is 50% larger than the cross-sectional area of one of ..
A lagoon with a volume of 1200 m^3 has been receiving a steady flow of a conservative waste at a rate of 100m^3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 10mg/L.
A 12.0 m rectangular channel, having a bed slope of 50 cm/km and a Manning roughness coefficient of 0.015, conveys water at a normal depth of 1.0 m. A dam is built across the channel at which the water depth is 2.0 m.
Assume Stoke's Law holds true for the following question. You are asked to desgin a settling basin. Flow rates are 16 million gallons/day. The basin must be 4m deep, and 4m wide. Particle size ranges from 0.2-50 mm in diameter.
For energy conservation, materials with a high thermal capacity are effective in climates in which the heat flow through the building envelope is:
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.
The average rate of flow measured in a gage at the outlet of the watershed was 30 m^3/sec. Estimate the water losses due to the combined effects of evaporation, transpiration, and infiltration due to ground water.
A crest vertical curve and a horizontal curve on the same highway have the same design speed. The equal-tangent vertical curve connects a +3% initial grade with a +1% final grade and has a PVC at 101+78 and a PVT at 106+72
A canal is constructed parallel to a river 600 m away both fully penetrating an unconfined aquifer of coarse sand and fine gravel as shown in the illustration below. The aquifer is subject to an average infiltration of 2.3 m/year
An alloy is made up of 199.4 lbm copper, 204 lbm zinc, and 4.2 lbm lead. What is the composition, in atom percent, of the Cu-Zn-Pb alloy.
Suppose a specialty steel company receives an order for 200 tons of steel containing at least 3 percent nickel and 2 percent manganese, with a carbon content not exceeding 3.5 percent. The steel will sell for $25 a ton.
An element in plane stress is subjected to stresses sigma x=27 MPA,sigma y=14 MPA,sigma xy=6MPA.Using mohr's circle,determine the stresses acting on an element oriented at an angle 40 degrees from the x axis.
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