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A bore made in an aluminium block at 34ºC is 3.48cm\(^3\). What is the new bore...

Physics
JAMB 2025

A bore made in an aluminium block at 34ºC is 3.48cm\(^3\). What is the new bore when the temperature was raised to 340ºC [α\(_a\) = 24 x 10\(^{-6}\)K\(^{-1}\)]

  • A. 4.14cm\(^3\)
  • B. 3.83cm\(^3\)
  • C. 3.56cm\(^3\)
  • D. 3.24cm\(^3\)
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Correct Answer: Option C
Explanation

\(\gamma\) = 3 \(\alpha\)

\(\gamma\) = 3 x 24 x 10\(^{-6}\) = 72 x  10\(^{-6}\)k\(^{-1}\)

V\(_2\) = V\(_1\)(1 + \(\gamma\) ∆T)

V\(_2\) = 3.48 x (1 + 72 x  10\(^{-6}\)k\(^{-1}\) x 306)

V\(_2\) = 3.48 x (1 + 0.022032)

V\(_2\) ≈ 3.56cm\(^3\)

There is an explanation video available below.


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Explanation Video

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