Physics · May / June 2025 · Paper 62 · Question 4
0625
As printed in the paper
The question as text
0625/62/M/J/25 © UCLES 2025 4 Hot water is poured into a glass beaker and allowed to cool down for 5 minutes. Plan an experiment to investigate whether the rate of cooling of the hot water depends upon the initial temperature of the hot water. The rate of cooling of the water can be calculated using the equation: rate of cooling = decrease in temperature time taken . You are provided with: • a supply of cold water • an electric kettle • a 250 cm3 glass beaker • a measuring cylinder. You may use any other common laboratory apparatus. In your plan, include: • any other apparatus needed • a brief description of the method, including what you will measure and how you will make sure your measurements are accurate • the variables you will control • a results table to record your measurements (you are not required to enter any readings in the table) • how you will process your results to reach a conclusion. You may include a labelled diagram.
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Show the answer and mark scheme
MP1
additional apparatus:
stopwatch / timer / clock and thermometer / temperature probe / sensor
MP2
method:
MP3
repeat for a new value of (initial) temperature
MP4
control variables:
any one from:
MP5
results table:
columns for initial temperature and final temperature with correct units
MP6
conclusion:
any one from:
MP7
additional point:
any one from:
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