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JAMB Physics 1992 Question 14

Question 14

Thermal Expansion

A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and day-time temperatures are 10°C and 35°C respectively. The linear expansivity of steel is 0.000012 C−1

  1. A.0.18cm
  2. B.1.80cm
  3. C.18.00cm
  4. D.1800cm
Show the answer and explanation

Answer: C (18.00cm)

Explanation

Change in length = 600 × 0.000012 × (35 − 10) = 0.18 m, which is 18.00 cm.