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Consider atmospheric air at 25 degrees Celsius and a velocity at 25 m/s flowing over both surfaces of a 1 meter long flat plate that is maintained at 125 degrees Celsius. Determine the rate of heat transfer per unit width from the plate for values of the critical Reynolds number corresponding to 10^5, 5x 10^5, and 10^6.
a closed piston-cylinder with air expands and does 2000 ft-lbs of work. heat is added in the amount of 4 btu. what is
We are separating ethanol and water. All percentages are mol%. Find the q values and plot the feed lines. a) Feed is 60% ethanol and flashes in the column with v/f=0.37 b)Feed is 40% ethanol and is a two-phase mixture with liquid and vapor in equilib..
The slotted wheel rolls to the right without slipping,
the mass center of the rear-engine 3200-lb car is at g. determine the normal forces na an nb exerted by the road on the
a steel disc 300 mm diameter of mass 29kg is suspended from the end of a wire 2.5 mm diameter and 1.5 m long which is
a structural lin that is 3 in. wide and 0.5 in. thick is to have a factor of safety of 2 relative to its yield strength
nasa is designing a mission to explore titan the largest moon of saturn. titan has numerous hydrocarbon lakes
consider a light single-engine airplane such as the piper super cub. if the maximum gross weight of the airplane is
Air (ideal gas) inside a cylinder filled with a frictionless piston undergoes a polytrophic process having an exponent n = 1.33. The initial pressure of the air is 3.34 MPa and the T (final) is 750 K and during the process the volume of the air is in..
A heat engine (HE) of 35 % thermal efficiency is used to drive a refrigerator having a COP of 4 , what is the heat input into the engine for each MJ removed from the cold body by the refrigerator? If this system is used as a heat pump, how many MJ of..
when environmental crews started cleaning up a closed government wwii laboratory they discovered thousands of unlabeled
argon is compressed isothermally from 100c at 1 atm to 4 atm. calculate the final temperature and the specific work
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