WAEC Physics 2015 Theory — Question 4

Question 4 of 26 from the West African Examinations Council (WAEC) Physics 2015 Theory paper, with the correct answer and a full explanation.

4. State three ways of increasing the rate of cooling of a cup of hot tea.

Model answer

(i) Reducing the temperature of the surroundings. (ii) Stirring the tea continuously. (iii) Increasing the rate of evaporation (e.g. by blowing across the surface or increasing the exposed surface area).

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