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.
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