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1. Six years ago, an 80-kW diesel electric set cost $160,000. The cost index for this class of equipment six years ago was 187 and is now 194. The cost-capacity factoris 0.6.
(a) The plant engineering staff is considering a120-kW unit of the same general design to power a small isolated plant. Assume we want to add a pre compressor, which (when isolated and estimated separately) currently costs $18,000. Determine the total cost of the 120-kW unit.
(b) Estimate the cost of a 40-kW unit of the same general design. Include the cost of the $18,000 pre compressor.
The mass of one wheel is 125 kg and its radius of gyration is 0.75 m. The radius of a wheel is 1 m.
the two blocks in the figureoscillate on a frictionless surface with a period of 1.7 s. the upper block just begins to
Compute the fugacities of ethane and n-butane in an equimolar mixture at 373.15K at 1, 10, and 15 bar total pressure using the viral equation of state.
Light is send through the two-sheet polarizing system with unknown orientation of the polarizing axes
a the vacancy formation energy in a particular metal is 0.5 ev. calculate the concentration of vacancies at 400 oc b
A refrigerant is compressed in the compression cylinder of a refrigerator from p1 = 112 psi, V1 = 13.0 in3 to p2 = 424 psi, V2 = 3.0 in3. Determine a value of n such that the data are fit by an equation of the form pV n = constant. Hint: You can take..
givenpiston mass 324 gramsbore diameter 80 mmstroke 88 mmconnecting rod length 136 mmmass of intake valve 47
Calculate the average heat transfer coefficient if the tube wall is maintained at a temperature of 200oC and it is 2 m long.
a square duct 30 cm x 30 cm is maintained at a constant temperature of 30 degc. an airstream of 50 degc and 1 atm is
Determine the mass flow rate of the air passing through this engine and the rates of heat addition and rejection when this engine produces 1000 hp. Assume constant specific heats at room temperature.
Water ?ows in a rectangular conduit 12-cm high and 60-cm wide having a maximum velocity of 20 m=s with the pro?les shown in Fig. 4.16. Assume the pro?le exists across the entire cross section with negligible end effects. Calculate the mass ?ux, th..
At the exit, the pressure is 113 kPa and the temperature is 69 degrees C. Determine the mass flow rate, the exit velocity and the area of the exit.
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