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A thermoelectric refrigerator is powered by a 12-V car battery that draws 3 A of current when running. The refrigerator resembles a small ice chest and is claimed to cool nine canned drinks, 0.350-L each, from 25 to 3°C in 12 h. Determine the average COP of this refrigerator.
A water treatment plant effluent is to be disinfected with chlorine from ton cylinders of compressed gas. The plant is 5 million gallons per day. There are a total of 10 useable cylinders in the plant.
What percentage removal should be expected for each of the following particle settling velocities in an ideal sedimentation tank: 0.1 mm/s, 0.2 mm/s, 1 mm/s.
The wet mass of a sample of a saturated soil is 520grams. the dry mass, after oven-drying, is 400grams. determine the water content, void ratio, saturated unit weight, and effective unit weight.
A rigid-walled cubical container is completely filled with water at 40F and sealed. The water is then heated to 100F. Determine the pressure that develops in the container when the water reaches this higher temperature.
The difference in water level is 60ft. Determine the size of pipe for a water temperature of 60 degrees Fahrenheit. Apply The Darcy-Weisbach equation.
A parking facility on a campus was recently opened to faculty,staff and students.It cost a total of $ 300,000 to construct the facility. It is expected that thefacility will require no maintenance for the first 2 years ofoperation.At end of year 3, t..
assume a future where security countermeasures against dos attacks are much more widely implemented than at present. in
Traffic signals were installed at an intersection involving two one-way streets. Suppose 75% of the vehicles will decelerate when they see the amber light, whereas 20% will accelerate and 5% are "indecisive" and simply continue with the same speed..
Compute the maximum acceptable service load on an A36 steel plate tension member 1/4in.x12in. having a single line of holes parallel to the direction of loading. The load is 25% dead load and 75% live load, and 7/8in. diameter bolts are used.
Two Cables support a large lift which weighs 8 tons. find the forcein the cables and size them based on E= 30000 psi and the allowabletensile stress is 14400 psi.
Assume the stream is 3ft wide and 1ft deep (assume a rectangular cross section. If the flow throught the stream is 1000 gallons/day and the concentration at the beginning of the stream is 250 ppm
What is ko, the polar radius of gyration of a circle of radius r = 1.40m , when the pole is a point O on the circumference of the circle
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