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A double pipe heat exchanger is to be designed to cool 5 gallons per minute (gpm) of hot oil from 250°F to 120°F using 10 gpm of cooling water available at 70°F. The heat exchanger is to consist of 12-foot sections of ¾"-16 gauge copper tubing inside a 1 ½"-16 gauge copper tube with water flowing in the annular space. How many sections are required if the flow is: (a) Concurrent; (b) Countercurrent?
the l1m long vertical copper tube of inner diameter di20mm and wall thickness t2mm contains liquid water at twater0
a strip of metal is 250 mm long. it is stretched in two steps first to 300 mm and then nbspto 400 mm. show that the
determine the force in member of the loaded truss. assume that the four external reactions at and are equal in
air contained in a piston-cylinder assembly is initially at 350 k 150 kpa and a volume of 0.15 l. as the cylinder is
a gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processesprocess 1-2
The initial cost of a pickup truck is $10,478 and will have a salvage value of $3,959 after five years. Maintenance is estimated to be a uniform gradient amount of $142 per year, with zero dollar for first year maintenance. The operation cost is esti..
a heavy inverted cylinder of length l and radius r is initially held above the surface of the ocean density of sea
1.an in-line six cylinder 6.6 liter four-stroke cycle si engine with multiple port fuel injection operates at 3000 rpm
one kilogram of carbon dioxide is compressed from 1 mpa and 200 degrees celsius to 3 mpa in a piston cylinder devise
an engineering student considers using a fan as a levitation demonstation. she plans to face the box-enclosed fanso the
it is observed that when a regulation 20 ounce basketball is dropped from a height of 1.3m onto a floor it bounces back
An air-standard Otto cycle has a compression ratio of 6. At the beginning of compression, the pressure is 100 kPa and the temperature is 300 K. During the heating process, the temperature is raised to 2500 K. Assume that the cold air-standard assumpt..
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