Post-UTME Physics 2010 Objective — Question 8
Question 8 of 10 from the Post-UTME Screening (Post-UTME) Physics 2010 Objective paper, with the correct answer and a full explanation.
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If the temperature of a small quantity of water in a closed container is gradually increased from 0°C to 40°C, then the density of the water within this range
- A. Increases for a while and then decreases
- B. decreases for a while and increases
- C. increase gradually
- D. decrease gradually
Explanation
Water has an anomalous density maximum at 4°C, so density should increase from 0-4°C and then decrease from 4-40°C (option A). The source key states 'increase gradually' (option C), which appears to be an error given water's well-known anomalous expansion.
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