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On a summer day the air temperature is 27°C and the relative humidity is 30%. Water evaporates from the surface of a lake at a rate of 0.10 kg/h per square meter of water surface area. The temperature of the water is also 27°C. Determine the value of the convection mass transfer coefficient.
a rigid tank is connected by a valve to a supply line where refrigerant at 1.4 mpa and 100 degrees celsius flows
It has been decided that the speed should be in the range 200 ft/min to 400 ft/min, and that the depth of cut will be 0.080 in. The tool nose radius = 3/64 in. Determine the speed and feed combination that meets these criteria.
On a certain day the barometric pressure at sea level is 30.1 in. Hg, and the temperature is 70°F.- Estimate as accurately as possible the altitude of the airplane above sea level.
Not including the effect of stress-concentration, what are the minimum allowable diameters for segments AB and BC to achieve a safety factor of 3?
The air in a cylinder fitted with a piston is saturated with water vapour. The volume is 0.3 m3. the pressure is 3.5 bar and the temperature is 60.1°C.
the refrigerator steadily receives a power input of 0.15 kw while rejecting energy by heat transfer to the surroundings
a flat plate separates two supersonic air flows. the flow along the upper surface has a mach number of 1.4 and a
Derive a formula for the lateral pressure p between the rubber and the steel. (Disregard friction between the rubber and the steel, and assume that the steel cylinder is rigid when compared to the rubber.)
What is the minimum value of the laser pulse energy for which SBS can be excited? (In fact, transverse SBS has been observed under such conditions similar to those assumed in this problem; see, for example, Murray et al., 1989.)
a permanent magnet dc motor is coupled to a load through a gearbox. if the polar moments of inertia of the rotor and
Calculate the stress at a point away from the hole, to the right of the beam toward the end and Calculate the stress at the hole?
the constant tensions of 200 n and 160 n are applied to the hoisting cable as shown. if the velocity v of the load is
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