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Two plates are suspended vertically in 20 C atmospheric air forming a channel of width 18cm. The plates are 3m high and are maintained at a temperature of 275 C. If the channel is 5 m deep, find the convective heat transfer in the channel
an fcc iron-carbon alloy initially containing .2 wt carbon is carburized at an elevated temperature and in an
It is known that a long log floats with its axis horizontal. A very short log, however, floats with its axis vertical. Determine the maximum length of a cylindrical walnut log 30 cm in diameter that will cause it to float with its axis vertical.
a steel angle iron loaded in compression is added to a structure in order to increase its rigidity. although the two
a steady flow compressor is used to compress air from 1 atm 25ordmc to 8 atm in an adiabatic process. the compressor
Ten cubic feet of air is cooled at a constant pressure of 80 psi. The initial temperature is 180 0F and the final temperature is 100 0F. Assume air is an ideal gas, Cp = 0.241 Btu/lb 0R and Cv = 0.173 Btu/lb 0R and R = 1545 lbf/lbmol 0R, M = 28.97 lb..
air at 1 atm and 30 degc flows over a 15 cm square plate at a velocity of 10 ms.a. calculate the maximum boundary layer
a disk cam rotates at a constant speed of 300 rpm and drives a translating roller follower through a rise of 1.5 inches
a motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. from the odometer in the car the motorist
a piston-cylinder device connected to a feeding line by a valve contains air at 7oc and 210 kpa. initially a linear
during january at a location in alaska winds at -23degf can be observed. several meters below ground the temperature
a compressed air cylinder initially contains air at 25ordmc and 100 kpa. the volume of the cylinder is 0.01021 m3. the
a 6-lb block is attached to a cable and to a spring vertically the cable above and the spring below. the spring
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