O-LevelPhysicsThermal PhysicsOct/Nov 2023Paper 4 Q210 Marks
A student investigates the rate of cooling of water at the top and at the bottom of a beaker of hot water. (a) The student: • measures the room temperature θR as θR = 22.5 °C • pours 200 cm³ of hot water into a beaker • lowers a thermometer into the beaker until its bulb is just covered by the hot water, as shown in Fig. 2.1 • waits for approximately 30s • starts a stop-watch and reads the thermometer.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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