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A metal rod 800mm long is heated from 10oC to 95oC. If it expands by...

Physics
JAMB 1993
A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is
  • A. 2.0 x 102K-1
  • B. 2.0 x 102K-1
  • C. 5.0 x 10-3K-1
  • D. 2.0 x 10-5K-1
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Correct Answer: Option D
Explanation
a = \(\frac{1.36}{800 \times (95 - 10)}\)

= 2.0 x 10-5K-1
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