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A volcano has erupted, spewing stones, steam, and ash several thousand feet into the atmosphere. After some time, the particles begin to settle to the ground. Consider a nearly spherical ash particle that is 50 microns in diameter, falling in air whose temperature is -50°C and whose pressure is 55 kPa. The density of the particle is 1240 kg/m3. Estimate the terminal velocity of this particle at this altitude.
assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
The wearing parts of a coal mining machine are made of hardened tool steel, but are rarely, if ever, lubricated. The left and right wear plates for a typical tracked vehicle measure 48" long by 6" wide, and each tests at 360 HB. The vehicle weighs 10..
1. work at a rate of 25 kw is done by a paddle wheel on a slurry contained within a closed rigid tank. heat transfer
determine the mass flow rate of fuels in grams per second from the gasoline tank to the cars fuel injection systems and
calculate the nusselt number and the convective heat transfer coefficient for water at a bulk temperature of 32oc
the temperature in a vessel is 36 degree celsius and the proportion by mass of air to dry saturated steam is 0.1. what
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
the volume flow rate of metal into a mold is .025m3min. the top of the sprue has a diameter of 20mm and its length is
the inlet to a boiler of a carnot power cycle is at 5 mpa saturated liquid and the exit is saturated vapor. the
at room temperature 23oc a cylinder of steel has a diameter of 15.02 mm which is too large to fit into a 15 mm diameter
a completely reversible refrigeration cycle removes heat at a rate of 100kw from an industrial refrigerator maintained
Water flows in a 2 ft diameter duct under the following conditions: p1= 55 psia and v1=20ft/sec. At another section 12 ft below the first the diameter is 1 ft and the pressure p2=40 psia. Compute the frictional losses between these two sections. Dete..
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