Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 20, Problem 14P
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A furnace is shaped like a long equilateral-triangularduct where the width of each side is 2 m. Heat is supplied fromthe base surface, whose emissivity is «1 = 0.8, at a rate of800 W/m2 while the side surfaces, whose emissivities are 0.5,are maintained at 500 K. Neglecting the end effects, determinethe temperature of the base surface. Can you treat this geometryas a two-surface enclosure?
Consider a long brass bar of cross sectional area 3.96 x10−4 m2. The hot end is maintained at 307.7 °C, while the other end is kept at a constant, but lower temperature. The bar is insulated on its sides, losing heat only at the colder end. Heat flows through the bar at the rate of 4.59 J/s. What is the temperature of the bar at a point 0.237 m from the hot end?
A cylindrical copper rod of length 1.2 m and cross-sectional area 4.8 cm2 is insulated along its side.The ends are held at a temperature difference of 100 C by having one end in a water–ice mixture and the other in a mixture of boiling water and steam. At what rate (a) is energy conducted by the rod and (b) does the ice melt?
Chapter 20 Solutions
Physics for Scientists and Engineers
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