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A heat exchanger is to consist of 300 tubes 5 ft long and 1 in. in outer diameter. The tubes are to be arranged in 15 staggered rows with transverse and longitudinal pitch of 2 in. For a tube surface temperature of 210°F and air at atmospheric pressure and 95°F flowing normal to the tube bank at a superficial velocity of 20 ft/sec, determine the total rate of heat transfer.
405-N rightward force is use to drag a large box across the floor with a constant velocity of 0.678 ms-1. The coefficient of friction between the box and the floor is 0.795. Determine the mass of the box.
Assuming that collapse occurs by Euler buckling of the strut, determine the angle θ for minimum weight of the strut.
Determine the eccentricity which produces this amount of acceleration at 5000 rpm, and give the permissible amount of unbalance in N.m (Wr) for a 4500 N rotor.
The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate the number of kilograms of hydrogen that pass per hour through a 5.5-mm-thick sheet of palladium having an area of 0.84 m2 at 500°C.
Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of shaft power. The free surface of the upper reservoir is 45 m higher than that of the lower reservoir.
Another infinite straight wire, aligned with the y-axis is now added at a distance 2L = 68 cm from segment bc of the loop as shown. A current, I3, flows in this wire. The loop now experiences a net force of zero.
Calculate the pressure required in the larger section just ahead of the nozzle in Fig. 6.22 to produce a jet velocity of 75 ft/s. The fluid is water at 180°F.
water at 70 kpa and 100 c is compressed isentropically in a closed system to 5 mpa.determine the final temperature of
A cylindrical wooden storage vat has a 20 ft outside diameter. It is filled with 24 feet of brine with a specific gravity of 1.06. The wooden staves making up the vat are bound by flat steel bands evenly spaced vertically around the tank.
A block of metal has a 90 notch cut from its lower surface. The notched part rests on a circular cylinder of diameter 2.0 cm, as shown in Fig. 4.15. If the lower surface of the par is 1.3 cm above the base plane, how deep is the notch?
an article suggests that a poisson process can be used to represent the occurrence of structural loads over time.
one of the problems of wind tunnel testing at airspeeds near sonic speed is the large effect on the flow conditions of
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