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A power washer used to clean the sidingof a hosue has water entering through a hose at 20C, 1atm and avelocity of 0.2m/s. A jet of water exits with a velocity of20m/s at an average elevation of 5m, with no significant change intemperature or pressure. At steady state, the magnitude ofthe heat transfer rate from the power washer to the surroundings is10% of the electrical power input. Evaluating electricity at8 cents per kW x h determine the cost of the power required, incents per liter of water delivered. Compare with the cost ofwater , assuming 0.05 centers per liter, andcomment.
consider the arrangement described in problem 1. a cable attached to the 100 lbm piston exerts a 200 lb force upward on
Read the titled books Drilling Fluid Engineering Manual. Textbook prepared by M-I Drilling Fluids Co.,1998; Halliburton Cementing Tables. Casing and cement data tables prepared by Halliburton Company.
1.based on the hume-rothery rules speculate on the possible driving forces behind the tendency for ordering in this
using a 3 flute solid carbide 20mm diameter slot drill. with feed rate of 0.175mmtoothrev at a depth of cut of 12mm and
consider two very large parallel plates. the bottom plate is warmer than the top plate which is held at a constant
estimate the diameter of an aluminum atom given that the density is 2.7 gramscubic centimeter and the atomic mass is
The system on site is a pressure sand filter, with a service curve. The filter is backwashed using the feed pump, at a higher flow rate, shown as backwash curve. What is the speed of the pump to achieve the service and backwash flow rates ?
the angle between the direction of motion of a conductor and the lines of flux is 30deg. the length of the conductor in
Consider a 70-kg woman who has a total foot imprint area of 400 cm2. She wishes to walk on the snow, but the snow cannot withstand pressures greater than 0.5 kPa. Determine the minimum size of the snow shoes needed.
determine the number of automobiles with premair catalyst treated radiators needed to reduce the ozone concentration in
a hydraulic cylinder has a piston of cross sectional area 45cm2 and a constant working fluid pressure of 2.2mpa. the
a piston cylinder device contains 0.5 kg of water at 1.0mpa and 400oc. now it is cooled to 1mpa in sat-v phase.
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