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calculate the work done by the piston cylinder device
A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120°C. The nitrogen is now expanded poly-tropically to a state of 100 kPa and 100°C. Determine the boundary work done during this process.
For a circular curve with a radius R of 400 meter, what is the degree of curve by (a) arc definition and (b) chord definition
An 8000 mile^2 watershed received 20 in. of precipitation in a 1 year period. The annual stream flow was recorded as 5000 cfs. Roughly estimate the combined amounts of water evaporated and transpired.
a solid cylinder of 50 mm diameter and 900 mm length is subjected to a tensile force of 120kN. One part f the cylinder L1 long is of steel, the other part, fastened to steel, is aluminum and is L2 long.
Typical water supply at a faucet in any building is conveyed in copper pipe that is ½" in inside diameter, with a wall thickness of 0.040". If the water pressure is 50 psi and the valve is closed (meaning that water is not flowing)
Write a brief (No more than a few paragraphs plus the equations themselves on a) description of the three-dimensional unsteady Navier-Stokes equations as applied to water. The description should include a brief history
A certain crop has a consumptive use requirement of 1.2 ac-ft of water per acre of crop land. The crop is planted on 780 acres of land. Precipitation falling during the growing season is 3.2 inches. The remainder of the 1.2 ac-ft /ac
A truck driver used sand to soak up a 1 g spill of lindane (C6H6Cl6). He placed the contaminated soil in an open drum which then filled with 150 L of water during a rainstorm. You test the water and find a concentration of 17 M/L.
A 4-cm- diameter rod of aluminum 7075-T6 is to subjected to an axial tensile force such that the factor of safety based on the yield stress on 1.75. Find the maximum allowable tensile force. The yield stress of the aluminum 7075-T6 is o-y= 500MPa.
For the cupboard unit shown in Figure 7(a), determine the largest value of h for which the cupboard will slide before it tips. Let the coefficient of static friction be µs.
At the end of 15 years, the first motor will have a salvage value of $50 and the second motor will have a salvage value of $100. consider the MARR to be 8%. (note : 1HP=0.7457 kw). Determine which motor should be installed based on the PW criterio..
A trough is 5 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x6 from x=?1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required
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,
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