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What is the convection mass transfer coefficient associated with fully developed atmospheric airflow at 27°C and 0.04 kg/s through a 50-mm-diameter tube whose surface has been coated with a thin layer of naphthalene? Determine the velocity and concentration entry lengths.
assume that a jet touches down 170 mph and its speed is reduced to zero in 240 ft. assuming a constant deceleration
Calculate the average distance between dislocations for both cases. For sim- plicity, assume all of the dislocations are parallel and in a square pattern.
A 2-in.-diameter bar of 4320 steel is to have a hardness of at least HRC 35. What is the minimum severity of the quench (H coefficient)? What type of quenching medium would you recommend to produce the desired hardness with the least chance of que..
A cylinder contains 1 kg of a certain fluid at an initial pressure of 20 bar. The fluid is allowed to expand reversibly behind a piston according to a law PV^2=constant until the volume is doubled. The fluid is then cooled reversibly at constant pres..
Compute the percentage ionic character of the interatomic bond for each of the following compounds: MgO, GaP, CsF, CdS, and FeO
in an ammonia refrigeration plant 2 kgmin of ammonia enters the compressor at 1.902 bar and 0.96 dry and is compressed
For a normal distribution, find the z score values that separate
Give the advantages and drawbacks of metal matrix composites over polymer matrix composites.
Determine the irreversibility rate of the condenser and the condenser's entrance and exit specific flow availabilities.
An insulated rigid tank is divided into two equal parts initially by a partition. Initially, one part contains 5 kg of air at 800 kPa and 75° C and the other part is evacuated. The partition is now removed and the air expands into the entire tank. De..
refrigerant 134-a is contained in a 4 ft3 tank at 160 lpfin2. at the beginning the saturated vapour occupies a volume
in a carnot cycle heat is supplied at 350degc and rejected at 27degc. the working fluid is water which while receiving
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