Physics · Oct / Nov 2025 · Paper 62 · Question 3
0625
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The question as text
A student investigates the cooling of water. The student sets up the apparatus shown in Fig. 3.1. beaker thermometer stand Fig. 3.1
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3(a)(i)[1]
87.0 (°C)
3(a)(ii)[1]
min/minute(s) and 1, 2, 3, 4, 5
3(b)(i)[1]
to get the highest temperature reached/to allow the liquid in the thermometer time to expand/to allow the beaker to warm up/to allow the thermometer to reach the temperature of the hot water/to allow the thermometer (time) to respond/to ensure that the temperature has stopped rising
3(b)(ii)[1]
read thermometer perpendicular to the scale/at eye level / hold the stopwatch close to the thermometer/thermometer not touching the sides/base of the beaker/stir the water before taking a reading
3(c)(i)[1]
11.5 °C
3(c)(ii)[2]
R1 = 5.75 / candidate’s (c)(i) ‣ 2
°C / min
3(c)(iii)[1]
R2 = 3.5 (°C / min) or 0.0583 (°C / s)
3(d)[1]
cooling rate decreases (with temperature/time)
3(e)(i)[1]
45–55 (°C) inclusive
3(e)(ii)[1]
room temperature/21.5 °C
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