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(a) What is the definition of an isentropic process for a control volume system with a single stream and under a steady state ?
(b) What are the two conditions of the process that are required for an isentropic process defined in (a) to take place ? Prove your answers with second law equation for a control volume.
A horizontal curve is being designed for a new two-lane highway(12-ft lanes). The PI is at station 250 + 50, the design speed is 65 mi/h, and a maximum superelevation of 0.07 ft/ft is to be used.
what would be the horizontal and vertical component from this acting force see diagram
Assuming steam to be an ideal gas, calculate its specific volume and density at a pressure of 90 lb/in^2 and a temperature of 650°F.
Model tests are to be performed to study the flow through a large check valve having an inlet diameter of 2 feet and a volume flowrate Qp of 30 cfs. The working fluid in the model is water at the same temperature as that in the prototype.
A combined footing is subjected to an exterior 16 in. x 16 in. column abutting the property line carrying a total service load Pw = 300,000 lb and an interior column 20 in. x 20 in.
Estimated rolling resistance factor the haul road is 3000 lb/ton. If the scraper weighs 35,000 lb (empty) and carries 25 loose cubic yards per trip. What is the rolling resistance of the loaded unit?
A sand is densified by compaction at a construction site so thatthe void ratio changes from 0.8 to 0.5. If the specific gravity ofthe soil solids is 2.7, what is the increase in the dry unit weight of the sand
The two outer bars (material A) are identical. The cross- sectional area of the middle bar (material B) is 31.544% larger than the cross- sectional area of one of the outer bars. Also, the modulus of elasticity of material A is twice that of mater..
a file of student records contains name sex m or f age in years and marital status single or married for each student.
A soil has a moisture content of 31.4%, a degree of saturation of 90% and a unit weight of 17.3kN/m^3. Determine the specific gravity of the soil solids.
A college student borrows $1500 during his senior year. The loan is to be repaid in 20 equal quarterly installments. The interest rate is 5% per year with the first payment to be made 3 years after the date of the loan. What will be the approximat..
How many extractions are required to decrease the concentration of phenol below 100 mg/L in a wastewater containing 2000 mg/L of phenol if an ether-to-watewater ratio of 0.2 by volume is used in each extraction
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