P27 051

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51. We use Eq. 27-17: ρ

− ρ

0

= ρα(T

− T

0

), and solve for T :

T = T

0

+

1

α

ρ

ρ

0

1

= 20

C +

1

4.3

× 10

3

/K

58Ω

50 Ω

1

= 57

C .

We are assuming that ρ/ρ

0

= R/R

0

.


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