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Determine the drag on a small circular disk of 0.01-ft diameter moving 0.01 ft/s through oil with a specific gravity of 0.87 and a viscosity 10,000 times that of water. The disk is oriented normal to the upstream velocity. By what percent is the drag reduced if the disk is oriented parallel to the flow?
Sketch the streakline of the smoke, the pathline of the first particles leaving the chimney, and a few streamlines, assuming that the wind blows parallel to the ground in a constant direction.
a flashlight is powered for 30 minutes by a 9-v battery supplying power at 0.5 amps.a find the resistance of the
A centrifugal air compressor is driven at 40,300 rpm. The inlet eye of the compressor has a hub diameter of 2.09 in and an outer diameter of 4.56 in. The impeller tip diameter is 6.97 in. It has been found the compressor ratio is 2.44 and the air flo..
a pump is used to pressurize water from 1 bar to 50 bars at a rate of 1kgs. assuming that the low pressure state is
The spool has a mass of 75 kg and a radius of gyration . It rests on the inclined surface for which the coefficient of kinetic friction is . If the spool is released from rest and slips at A, determine the initial tension in the cord and the angul..
The Earth is approximately two-thirds water and can be approximated as a sphere of 8000 mi in diameter. Then, discuss the implications for these estimates.
a rigid well insulated container with a volume of 2 ft3 holds 0.12 lb of ammonia initially at a pressure of 20 lbfin2.
a rocket has an empty weight of 500lb and carries 330lb of fuel. if the fuel is burned at the rate of 1.3 lbs and
a prove using the increse in entropy principle that the maximum thermal efficiency for any heat engine is the carnot
the ice cap at the north pole may be 1000 m think with a density of 920 kgm3. find the pressure at the bottom and the
Estimate the shear and moment at each end of beams IJ and JK - analyzing the second-floor beams and the attached columns
Look carefully at how messages and mailboxes are represented in the e-mail system that you use. Model the object classes that might be used in the system implementation to represent a mailbox and an e-mail message.
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