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Air at 0.9 MPa and 400 K enters a converging nozzle with a velocity of 180 m/s. The throat area is 10 cm2. Assuming isentropic flow, calculate and plot the mass flow rate through the nozzle, the exit velocity, the exit Mach number, and the exit pressure-stagnation pressure ratio versus the back pressure-stagnation pressure ratio for a back pressure range of 0.9 ≥ Pb ≥ 0.1 MPa.
Define the f/m ratio in the context of biological treatment of wastewater, and relate the f/m ratio to the exponetial growth and declinign growth phases of a bacterial culture.
Property rights along bodies of water vary from the the thread of the stream to high water marks, and is based upon the navigability of the body of water and state law (true or false)?
Using a safety factor of 2.00 and neglecting the pile dead weight, find the length of a 1' diameter circular concrete pile required to take a design load of 50 kips in a soil composed of two layers.
water is pumped into an irrigation pond at 250 gal/min for 24 hours. the pond area is 2500 square feet. Determine the depth of water in the pond .Provide answer in ft and m
A fellow I know wanted to know the coefficient of friction between steel and commercial carpet. The value was not in the tables of any textbook he had, so he devised an experiment.
A distance is measured through mountainous terrain and found to be 5182.40 ft. If on the average a plumb bob is used every 50 ft with a probable error of ±0.02 ft, what is the probable total error in the whole distance?
Determine the effective size as well as the uniformity coefficient and coefficient of curvature for each soil. Determine also the percentages of gravel, sand, silt, and clay according to (a) ASTM, (b) AASHTO, (c)USCS, and (d) the British Standard.
estimate the theoretical production of landfill gas (CH4 only) from the degradation of 20.3 kg of rapidly decomposable MSW. asssume the density of methane is 0.7177 kg/m^3.
For this problem, read and understand the specifications to determine the system behavior. The specifications are intentionally somewhat ambiguous. If you find some rules on system behavior unavailable, state your assumptions and proceed forth wit..
What is the result of a volume change in a saturated cohesive soil because of expulsion of the water occupying the void spaces
For Oil (SG=0.86, u=0.025 Ns/m^2) flow of 0.3m^3/s through a round pipe with diameter of 500 mm, determine the Reynolds number. Is the flow laminar or turbulent
An uncatalyzed reaction has a rate of 4.2 x 10-7 sec-1. When an enzyme is added the rate is 3.2 x 104 sec-1. Calculate the rate enhancement caused by the enzyme.
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