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A contractor is considering the purchase of an earthmover to avoid the cost of a rental unit. The earthmover costs $350,000 initially and will cost $7000 per year to store and maintain. When used, the operating cost is $300 per day to the contractor. A rental unit costs $500 per day to rent and operate. The contractor estimates that he would keep the earthmover 20 years and could then sell it at salvage for $20,000. He requires a 12% rate of return on any investment. Determine how many days per year he would have to operate the earthmover to make it a worthwhile purchase. Sketch the breakeven chart for this situation.
A vehicle is traveling on a curved section of a road of radius 2500 feet at a speed of 60 mi/h. The motorist suddenly applies their brakes, causing the automobile to slow down at a constant rate. After 8 seconds the speed has been reduced to 45 mi..
A torque of T = 3.00 kN-m will be applied to the hollow thin-walled aluminum alloy section. If the section has a uniform thickness of 4 mm, determine the magnitude of the maximum shear stress developed in the section.
Compute the water table profile drawn in part B. Provide a detailed description of your methodology, and limit your solution to include only 4 image wells. Plot the profile, and provide drawdown amounts at X = -400 m, -200 m, -100 m, 100 m, 200 m,..
The total phosphate concentration (TOTPO4) in a river is 3.2 mg/L as P. The pH of the river is 7.8. What are the concentrations of H2PO4- and HPO42-
Assess the adequacy of this existing curve in light of the reconstruction design speed of 60 mi/h and, if the existing curve is inadequate, compute a satisfactory curve length.
What should TAC , TAB and the acute angle ? between TAB and the vertical to minimize the tension TAB ? Take o and W = 1,000 N. Hint: Consider various possible force triangles and decide on inspection how to minimize TAB.
The frame is desinged to carry the hanging mass at G equal to 167 kg. The frame is supported by a pin connection at C and the rope AB, and constructed with pin connections at points E, F, and D.
Part A Determine the tension developed in cable AB for equilibrium of the 350-lb crate Part B Determine the tension developed in cables AC for equilibrium of the 350-lb crate. Part C Determine the force developed along strut AD for equilibrium of ..
Laboratory analysis methodology to be used. Give details on the standard methods, instrument and detection limits. Standard methods for heavy metals analysis exist
An observer has determined that the time headways between successive vehicles on a section of highway are exponentially distributed and that 60% of the headways between vehicles are 15 seconds or greater.
A) Estimate the aquifer porosity and hydraulic conductivity, B) determine the flow rate per unit width of the aquifer, C) determine the specific discharge, D) determine average linear velocity of the flow assuming steady unidirectional flow
The ball is kicked so that it has a velocity of 0.5 m/s and the cord is pulled in at a rate of 0.2 m/s. Neglect friction so that the only important force on the ball is the tension in the cord. Find the tension in the cord when the radius is 0.25 ..
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