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The viscosity, µ of a liquid can be measured by determining the time, t, it takes for a sphere of diameter, d, to settle slowly through a distance, l, in a vertical cylinder of diameter, D, containing the liquid. Assume that
t = f(l, d, µ, Δγ ) where ?γ is the difference in specific weights between the sphere and the liquid. Use dimensional analysis to show how t is related to µ, and describe how such an apparatus might be used to measure viscosity.
If the deformation ef?ciency is 82% and the ef?ciency of transferring energy from the motor to the mill is 85%, what horsepower motor should be used?
the 14 slider a is pushed along the circular bar by the slotted bar. the circular bar lies in the horizontal plane. the
A steam compressor receives H 2O at 90kPa and 75% quality at a rate of 50 kg/s. Part way through the compressor, steam is bled off at 20kg/s, 2MPa and 300C. The remainder exits the compressor at 10MPa, 500C. Assuming heat transfer and changes in po..
In a heating/humidifying system moist air first flows through a heating coil and then through an air washer. The air enters the system at 55 °F dry-bulb temperature and 40 % relative humidity. The air exits the system at 90 °F dry-bulb temperature an..
helium in a steel tank is at 40 psia 540 r with a volume of 4 ft3. it is used to fill a balloon. when the tank pressure
1. a pump is being used to transfer water from an open tank p1 0 to one having air at 75 psig p2above the water as
a cube of aluminum 10 cm on each side is initially at a temperature of 300degc and is immersed in a fluid at 100degc.
Gear A rotates with an angular velocity of 100 rpm clockwise. Knowing that the angular velocity of arm AB is 50 rpm counterclockwise, determine the corresponding angular velocity of gear B.
calculate the nusselt number and the convective heat transfer coefficient for water at a bulk temperature of 32oc
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
Two standard gears have a diametral pitch of 12 and a gear ratio of 7.0. The center distance is 8 in. Determine the number of teeth on each gear.
A hollow cylinder steel column of 5 m high is shortens by 0.03 cm under a compression load of 40, 000 kg. If the inner radius of the cylinder is 0.08 of the outer one, what is the outer radius?
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