passwella.
Menu

JAMB Physics 1983 Question 22

Question 22

Thermal Expansion

The linear expansivity of brass is 2 × 10−5 °C−1. If the volume of a piece of brass is 10 cm3 at 0°C, what will be its volume at 100°C?

  1. A.10.02 cm3
  2. B.10.04 cm3
  3. C.10.06 cm3
  4. D.10.20 cm3
  5. E.102.00 cm3.
Show the answer and explanation

Answer: C (10.06 cm3)

Explanation

Cubic expansivity ≈ 3 × linear = 6 × 10−5 °C−1. Increase = 10 × 6 × 10−5 × 100 = 0.06 cm3, giving 10.06 cm3.