waec model questions vol1 2021 physics
Objective • Question 13
Question 13
WAEC_MODEL_QUESTIONS_VOL1
•
2021
A metal rod has a length of 2.00 m at 20°C. When heated to 120°C, its length becomes 2.04 m. Determine the coefficient of linear expansion \(\alpha\) of the metal in per °C.
Answer Options
A.
1.5×10⁻⁴ °C⁻¹
B.
2.5×10⁻⁴ °C⁻¹
C.
3.0×10⁻⁴ °C⁻¹
Correct Answer
D.
2.0×10⁻⁴ °C⁻¹
Correct Answer
D
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