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A thermoelectric refrigerator removes heat from a refrigerated space at -5°C at a rate of 130 W and rejects it to an environment at 20°C. Determine the maximum coefficient of performance this thermoelectric refrigerator can have and the minimum required power input.
Using the Gibbs function data, determine the equilibrium constant KP for the dissociation process O2 ?2O at 2000 K. Compare your result with the KP value listed in Table A-28.
A particular project has 650,000 cubic yards of material weighing 2600 lb/cy. your company has given you up to 10 - 657G tandem powered auger loaded scrapers to use to move the material. the 657g scrapers cost 160/ea per hour to operate and maintain
Two simply supported beams are coupled so their centers have equal deflections. The upper beam has length L1 and lower beam has length L2. Determine the deflection of the center of the beams.
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
Oxygen flows without a gain or loss of heat through a horizontal pipe of constant cross section. At section 1 the pressure 175 psia, the velocity is 78 fps, and the temperature is 50°F; at section 2 the pressure is 130 psia
Assume that a chemical reaction involving the removal of a given contaminant follows first order kinetics. The rate constant, k, is 0.5 hr-1. Compare the performance of the following reactors/reactor combinations. Provide your comments your results. ..
A section view of a dam shown and water is stored at an elevation of 6 m above the base. the water flows through the dam in a concreate opening 2m high and 3 m wide. there are no losses or friction.
What are the advantages and disadvantages of triaxial test in comparison with direct shear test
A 60 m long siphon spillway discharges water at .32 m^3/s. The siphon crown is 1.2m above the water surface elevation of the reservoir and a length 10m away
Design Span S2 of the continuous one-way slab example (we designed Span Si in class). Use ACI coefficients. The slab is to support a service live load of 170 psf in addition to its own weight. fc' = 3,000 psi and fy= 40,000 psi. The slab is to be ..
write a function that calculates the average of a set of numbers. name the function calculate_average. the function should accept one input which is an array of numbers.
A well installed into a confined aquifer with a porosity of 0.3 and saturated thickness of 80 ft. The gravel pack requires a well screen slot width of 0.025 inches. The hydraulic conductivity of the aquifer is 60 ft/d. The radius of influence is 1200..
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