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A 2000-pound, counterbalanced, propane forklift can be purchased for $30,000. Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10 when it will have a scrap/market value of $1000. Maintenance of the forklift is $400 per year during Years 1 and 2 while the warranty is in place. In Year 3 it jumps to $750 and increases $200 per year thereafter. What is the optimal life of the forklift (in years)?
A container of volume 0.04 m3 contains a mixture of saturated water and saturated steam at a temperature of 250oC. The mass of the liquid present is 9 kg. Find the total mass, quality of steam, specific volume, specific enthalpy, and specific inte..
the contractor ran out of gunite mixture and finished the deep corner of a 5-m-wide swimming pool, with a quarter circle pipe of PVC pipe. compute the horizontal and vertical forces on the curved panel AB.
The potentiometric surface elevations at two observation wells 1000 m apart are 52.35 m and 56.90 m. If the horizontal hydraulic conductivity of the auquifer is 25 m/ day determine the flow rate per unit width of the auquifer.
a 2.50-g sample of a large biomolecule was dissolved in 25.0 g of carbon tetrachloride. the boiling point of this
An Air manometer is connected to each side of an orifice, with a diameter of 8 inches, in a pipe with a diamter of 12 inches. If a maximum flow rate is 5 ft^3/s, what is the deflection of the manometer
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
After initial mixing, the DO concentration in the river is 9.5mg/L and the temperature is 15ºC. If the ultimate BOD of the mixed river water is 30mg/L,
Draw the influence line for the tension in cable BC. Neglect the thickness of the beam, What is the maximum tension in the cable due to the 6-k loading
Draw a graph showing the effluent concentration as a function of time for : a. Zero order CMFR and PFR with the same influent concentration and reaction rate. b. First order CMFR and PFR with the same influent concentration and reaction rate.
A single crystal of zinc is oriented for a tensile test such thatits slip plane normal makes an angle of 66.0° with the tensileaxis. Three possible slip directions make angles of 30°,48°, and 78° with the same tensile axis.
A stratified lake could be idealized as two layers: with 7.0 m of fresh water on top and 10.0 m of cold water (specific gravity = 1.02) on the bottom. What are the pressure heads at the interface and at the bottom of the lake, in terms of water col..
Compute the required weight of coarse aggregate per cubic yard. to adjust the mix so as to increase the compressive strength, the water-to-cement ratio is reduced to 0.45. will the quantity of coarse aggregate increase, decrease, or stat the same
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