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A wire of length 100.0m at 30o has linear expansive of 2x10-5K-1 Calculate the length...

Physics
JAMB 2013
A wire of length 100.0m at 30o has linear expansive of 2x10-5K-1 Calculate the length of the wire at a temperature of - 10oC
  • A. 100.08m
  • B. 100.04m
  • C. 99.96m
  • D. 99.92m
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Correct Answer: Option D
Explanation
\(L_2 = L_1 + \alpha(\theta_2 - \theta_1)\)

= 100 + 0.00002(-10-30) = 99.92

There is an explanation video available below.

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Explanation Video

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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts