WAEC Physics 2020 Objective — Question 15
Question 15 of 50 from the West African Examinations Council (WAEC) Physics 2020 Objective paper, with the correct answer and a full explanation.
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Two identical cups containing the same volume of water at 45C and 5C, are left in a room at 25C. Which of the following graphs correctly illustrates the variation of temperature with time?
- A. Graph ACorrect
- B. Graph B
- C. Graph C
- D. Graph D
Explanation
While water A cools to the room temperature, water B heats up to the room temperature 25C; both approach 25C from opposite directions over time, matching the trend shown in graph A.
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