Post-UTME Physics 2009 Objective — Question 9
Question 9 of 10 from the Post-UTME Screening (Post-UTME) Physics 2009 Objective paper, with the correct answer and a full explanation.
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A metal of length 30cm is heated until its temperature rises by 60 degrees C to a new length of 30.04cm. Calculate its linear expansivity
- A. 4.44 x 10^-5 K^-1
- B. 2.22 x 10^-5 K^-1Correct
- C. 3.33 x 10^-5 K^-1
- D. 1.52 x 10^-5 K^-1
Explanation
Linear expansivity = extension / (original length x temp change) = 0.04 / (30 x 60) = 2.22 x 10^-5 K^-1.
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