Engineering, 31.10.2019 00:31 b2cutie456
On january 9, 2014, 10,000 gallons of crude mchm (75% pure, density=0.9074 g/cm3) was spilled into the elk river in wv, which is tributary to the ohio river (assume the spill occurred instantaneously). estimate the mchm concentration profile at the greater cincinnati water works intake 310 km downriver. the river had a flow of q=3,350 m3/s during the spill, the average river width is 400 m, average depth is 14 m, the average slope is 8x10-5 m/m and a rectangular cross section can be assumed. assume mchm is conservative (not reactive) in this environment. how does the mchm concentration profile you calculate compare to the actual concentration of about 20?
Answers: 3
Engineering, 03.07.2019 14:10
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
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Engineering, 04.07.2019 18:10
Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
Answers: 1
Engineering, 04.07.2019 18:20
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.
Answers: 2
Engineering, 04.07.2019 18:20
Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg
Answers: 2
On january 9, 2014, 10,000 gallons of crude mchm (75% pure, density=0.9074 g/cm3) was spilled into t...
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