p19_070.pdf

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Chapter 19 - 19.70
70. The heat conducted is
Q = P cond t = kAt T
L
=
(67W / m
·
K)( π/ 4)(1 . 7m) 2 (5 . 0min)(60s / min)(2 . 3C )
5 . 2
×
10 3 m
=2 . 0
×
10 7 J .
 
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