WAEC Physics 2022 Objective — Question 44

Question 44 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.

A quantity of water at 0°C is heated to 30°C. For each degree rise in temperature, its density will A. rise steadily.

A. fall steadily
B. fall and then rise
C. rise and then falls

Explanation

Water exhibits anomalous expansion: as it's heated from 0°C to 4°C, density increases (rises); above 4°C, density decreases (falls) as normal thermal expansion takes over — so density rises then falls.

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