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A droplet of water (diameter 100 um) is falling through 20oC air at the terminal velocity of 0.298 m/s. The relative humidity of the air is 10% and the droplet is at the wet bulb temperature. The diffusivity of water vapor in air is 0.2 x 10-4 m2/s. (i) Estimate convective mass transfer coefficient. Viscosity of air: 18.24 × 10-6 Pa S Density of air: 1.19 kg/m3 (at 10% relative humidity)
electric power is to be generated by installing a hydraulic turbine-generator at a site 130m below the free surface of
Determine the minimum thickness of fibreglas insulation that needs to be used in the wall in order to avoid condensation on the outer surfaces.
determine the required diameter for the uniaxial tensile loaded two-force component if the failure criterion is
What is a 90 percent confidence interval for the standard deviation of the thickness of a washer produced by this procedure?
an ice chest is constructed of styrofoam k 0.033 wm?c with inside dimensions of 25 by 40 by 100 cm. the wall thickness
a short squared timber post supports a load of 115000 pounds. if the allowable unit compressive stress is 1000 psi what
block c starts from rest and moves downward with a constant acceleration. knowing that after 5 s the velocity of block a relative to block d is 8 ft/s, determine a) the acceleration of the block c. b) the acceleration of portion e of the cable.
a crate containing 40 bricks each of mass 1.3kg is placed on a storage framework as shown.a calculate the reaction
Determine the missing property among P,T
the train car has a mass of 10 mg and is traveling at 5 ms when it reaches a. if the rolling resistance is 1100 of the
comment on any safety hazards that might be encountered. especially, what would you anticipate if the inlet gas control valve were to malfunction and the gas space above the fuel were to reach full storage tank pressure (69bar)? the fuel tank has ..
a catheter is a specialised needle intended for long-term insertion into a vein in a patients arm. engineers are
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