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The U.S. Department of Energy estimates that 190,000 barrels of oil would be saved per day if every household in the United States raised the thermostat setting in summer by 6°F (3.3°C). Assuming the average cooling season to be 120 days and the cost of oil to be $20/barrel, determine how much money would be saved per year.
An emission control system for a new car costs $750 and reduces NOx emissions from 0.4 g/mile to 0.18 g/mile. Assume the car is driven 10000 miles per year, and the life of the emissions control system is 11 years with zero scrap value.
what is the maximum weight of the crate that the system can support? What is the angle theta required for equilibrium?
Moisture in the hot drying air condensing on the cooler grain near the plenum of the bin (Hint: The vapor in the ambient will condense out if the temperature of a surface is lower than the incoming air dew-point temperature).
Imagine a community for which its first roundabout is being built, something that is a relatively recent occurence even in this area. As the Director of Public Works for the community, how might you educate the members of the community?
The true azimuth of line AB is 193 degrees 20'. The angle measured counterclockwise between line AB and another line AC is 205 degrees 10'. The true azimuth of line AC is:
A 1-m^3 volume tank contains a mixture of 18.32 moles of oxygen, 16.40 moles of Nitrogen, and 6.15 moles of carbondioxide. What is the partial pressure of each gass componet at 25 degrees
The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination
Determine the discharge in the gutter if the spread is 2.0 m. Estimate the flow intercepted by the curb opening inlet placed in the composite gutter if the inlet length is 1.75m.
A rectangular unfinished concrete channel with wood forms is laid on a bottom slope of 0.0064 to carry a flow of 20m^3/s of water. Determine the width of the channel when the flow is in critical condition.
Suppose your wait time for a shuttle bus in the morning is normally distributed with µ=8 minutes and t1=5 minutes. Due to increased congestion in the afternoon, your wait time for a shuttle bus in the afternoon is normally distributed
The beam is supported by a pin at C and by a short link AB. Each pin has a diameter of 20 mm. Assume L = 1.2 m and θ = 20o. If the average shear stress in the pins at A, B, and C cannot exceed 115 MPa, determine the maximum distributed load wmax th..
A polutry farm owns 100 laying hens. Each week a hen can either lay 12 eggs or hatch 4 eggs, but not both. At the end of the four-week period all eggs and chicks will be sold: an egg will bring 10 cents, and a chick will bring 60 cents.
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