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A copper can, painted black, contains boiling water at 100°C - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Question 3
A copper can, painted black, contains boiling water at 100°C. The can is left to cool and a measurement of the water temperature is taken every 5 minutes. Figure 3 s... show full transcript
Worked Solution & Example Answer:A copper can, painted black, contains boiling water at 100°C - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Step 1
Plot these two points on the graph in Figure 4.
Answer
You need to plot the two unlisted points from the table at (10, 60) and (20, 37) on the graph. Locate the x-axis (time in minutes) and the y-axis (temperature in °C). For the first point, go to 10 minutes on the x-axis and move up to 60°C on the y-axis. Place a small mark there. For the second point, go to 20 minutes on the x-axis and move up to 37°C on the y-axis. Again, place a small mark at that position.
Step 2
Circle the anomalous point.
Answer
Examine the plotted points and look for any that do not align with the overall trend of cooling temperatures. Identify the point that deviates significantly from the expected temperature decrease, which is likely to be the one associated with the longer cooling time.