JAMB Physics 2018 Objective — Question 9
Question 9 of 38 from the Joint Admissions and Matriculation Board (JAMB) Physics 2018 Objective paper, with the correct answer and a full explanation.
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A solid metal cube of side 10cm is heated from 10°C to 60°C. If the linear expansivity of the metal is 1.2×10⁻⁵K⁻¹, calculate the increase in its volume
- A. 1000cm³
- B. 1.8cm³Correct
- C. 1001.8cm³
- D. 998.2cm³
Explanation
Volume expansivity αv ≈ 3α = 3.6×10⁻⁵K⁻¹. Volume of cube=1000cm³. ΔV = αv×V×Δθ = 3×1.2×10⁻⁵×1000×(60-10) = 1.8cm³.
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