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Determine the payback period for an asset that has a first cost of $40,000, a salvage value of $8000 anytime within 10 years of its purchase, and generates income of $6000 per year. The required return is 10% per year.
a 150 L helium tank contains pure helium at a pressue of 1825 psig. How many 3.5L helium balloons can be filled from the helium in the tank? (Assume an atmospheric pressue (14.7 psia) and a temp of 298K.
A wastewater treatment plant produces 34, 500 pounds of secondary sludge each day. Wastewater flows into the plant at a rate of 5.6 MGD and has an influent BOD of 325 mg/L. How many pounds of BOD are destroyed by this plant each day
A fluid that occupies a volume of 32 L weighs 280 N at a location where the gravitational acceleration is 9.8 m/s2. Determine the mass of this fluid and its density.
he concentration of carbon in an iron-carbon alloy is 0.15 wt%. What is the concentration in kilograms of carbon per cubic meter of alloy
After the cone of depression has achieved equilibrium, the piezometric heads at two observation wells 40 and 95 m from the pumping well are measured as 78.9 and 83.4 above sea level, respectively.
Determine the velocity and acceleration of block B and determine the velocity and acceleration of Car A relative to Car B.
Estimate the average hourly, average daily, and minimum hourly residential sewage flows from an area serving a population of 1500 people. Assume that the lenghth of sewer and house drains equals 3.0 km and that infiltration occurs
determine the force in members GF,FB, and BC of the Fink truss and state if the members are in tension or compression
For some minerals color is a diagnostic property making identification rather easy. However, certain minerals can also occur in a wide variety of colors making color a poor tool for identification. List different colors for the mineral quartz lo..
Ammonium (NH4+) is a weak acid with a pKa of 9.26. The dissociation is: NH+4 NH3 + H+. Calculate the mass of ammonium added to 1 L of water in order to obtain a pH of 4 at equilibrium.
How accurately would each 100-ft distance have to be measured so that the 95% error would no exceeded +-0.24ft in a total distance of 4000ft
The Washington Monument is 169 m tall. What is the stress in the lowermost rock if it is made of Georgia granite?
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