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The linear expansivity of brass is 2 x 10\(^{-5}\)  \(^oC^{-1}\). If the volume of piece of...

Physics
JAMB 2020

The linear expansivity of brass is 2 x 10\(^{-5}\)  \(^oC^{-1}\). If the volume of piece of brass is 10cm\(^3\) at 0\(^o\)C. What will be its volume at 100\(^o\)C? 

  • A. 10.06cm\(^3\)
  • B. 10.04 cm\(^3\)
  • C. 10.02 cm\(^3\)
  • D. 10.20 cm\(^3\)
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Correct Answer: Option A
Explanation

3 x \(\alpha\) = \(\frac{V_2 - V_1}{V_1 \times \Delta \theta}\)

3 x 2 x 10\(^{-5}\) = \(\frac{V_2 - 10}{100 \times 10}\) 

V\(_2\) = (100 x 10 x 3 x 2 10\(^{-2}\)) + 10

= 10.06 cm\(^3\)

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709