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Consider a hot-water pipe 12-m in length and 8-cm in diameter. The pipe is to be buried in the soil below the ground surface. The outer surface temperature of the pipe is constant at 60C and the surface temperature of earth is constant at 2C. The thermal conductivity of soil is 0.9 W/m.C. If the rate of heat loss from the pipe is to be kept around 1000 Watts, determine the depth at which the pipe need to be buried.
Steam enters a diffuser at 20 psia and 240oF with a velocity of 900 ft/s and exits as saturated vapor at 240oF and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine (a) the mass flow rate of steam and (b) the rate of entropy generation.
plot the evolution of the height, h, of the stable boundary layer and the strength, delta thetas, as a function of time.
given that the instantaneous voltage across a capacitor isvc401-e-tcrvoltswhen being chargerd by a 40 volt dc supply
a particular system obeys the relation uau-2expsr n moles of this substance initially at temperature to and pressure po
a 2500 lb car moving with a velocity of 3 mih hits a garage wall and is brought to rest in 0.05 s . determine the
1. an aluminum casting that weighs 10 pounds sits on a steel surface. how much force will be necessary to get it to
a steam turbine receives water at 15 mpa 600oc at a rate of 100 kgs shown in figure q4 below. in the middle section 20
a sheet of plywood 1.39 cm thick is used to make a cabinet door 55.5 cm wide by 69.5 cm tall with hinges mounted on the
block a is dropping at a velocity of 600mmsec and acceleration of 100mmsec2. it is attached directly to an inner
2000 kgh of steam drives a turbine that delivers 75 kw of shaft work. superheated steam at 5 bar enetrs the turbine at
what are the reaction forces of a pendulum at the pivot point at angles 0 45 and 90 from the horizontal. the pendulum
a gas station uses a 0.05 m3 tank to store air at 800 kpa absolute and 15c. the tank is equipped with a valve through
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