Long cylindrical AISI stainless steel rods (k =7.74 Btu/h·ft·°F and a = 0.135 ft2/h) of 4-in-diameter are heattreated by drawing them at a velocity of 7 ft/min through a21-ft-long oven maintained at 1700°F. The heat transfer coefficientin the oven is 20 Btu/h·ft2·°F. If the rods enter the ovenat 70°F, determine their centerline temperature when theyleave. Solve this problem using analytical one-term approximationmethod (not the Heisler charts).

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Chapter1: Units, Trigonometry. And Vectors
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Long cylindrical AISI stainless steel rods (k =
7.74 Btu/h·ft·°F and a = 0.135 ft2/h) of 4-in-diameter are heat
treated by drawing them at a velocity of 7 ft/min through a
21-ft-long oven maintained at 1700°F. The heat transfer coefficient
in the oven is 20 Btu/h·ft2·°F. If the rods enter the oven
at 70°F, determine their centerline temperature when they
leave. Solve this problem using analytical one-term approximation
method (not the Heisler charts).

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