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Suppose a utility generates electricity with a 36 percent efficient coal-fired power plant emitting the legal limit of 0.6 lb of SO2 per million Btus of heat into the plant. Suppose the utility encourages its customers to replace their 75-W incandescents with 18-W compact fluorescent lamps (CFL) that produce the same amount of light. Over the 10,000-hr lifetime of a single CFL, a) How many kilowatt-hours of electricity would be saved?
Battered piles are used on many construction projects as a permanent part of the element being constructed. Does this construction method have any play in the construction of a temporary earth retention system
The interior angles in a six-sided closed polygon traversewere observed as:
Observation wells are located 10 meter and 50 meters from the pumped well. After pumping continuously for 36 hours the drawdowns were 3.6 meters and 1.20 meters respectively.
A 301 stainless steel wire is suspended vertically from itsend. The wire is 400 ft long, diameter .75 inches, specific weight= 489 lb/ cubic foot.
how much money today is equivalent to lump sum of $100,000 in 20 years with interest rate of 6% per year compounded (a)monthly, (b)quarterly, (c)semiannually
Determine the minimum size of the pad footing 2 metres wide for a steel column if a factor of safety of 2.0 is recommended (include an estimate of self weight of the footing in your calculations). The total load of the column is 447.644kN
A signal approach has 20 seconds of displayed green, 4 seconds of yellow, and 3 seconds of all red (assume typical start-up, lost time, and clearance time). The cycle length is 60 seconds.
On this segment of freeway, the directional peak-hour volume is 3800 vehicles with 2% large trucks and 4% buses (no recreational vehicles), the peak-hour factor is 0.90, and all drivers are regular users.
Determine the COD, carbonaceous BOD, and nitrogenous oxygen demand of a 100 mg/L solution of urea (N2H4CO)
What are the velocities of both just before impact and just after impact. There is a distance of 5m between the vehicles prior to the winch being turned on.
The water treatment capacity in 1995 was 165 ML/day. A survey showed that the average per capita water use rate was 700 L/(person.day). Estimate the community's water requirements in 2010
What are the public safety implications of a flaw in a computer chip that is going to used to control a variety of instruments
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