Physics · Oct / Nov 2025 · Paper 22 · Question 4
5054
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A large test‑tube contains a thermometer and some solid wax at a temperature of 21 °C. At time t = 0, the test‑tube is partially immersed in a beaker of boiling water and the temperature of the wax is recorded for the next 600 s. Fig. 4.1 shows the variation of the temperature of the wax with time t. 80 60 40 temperature / °C 20 0 0 100 200 300 400 500 600 t / s Fig. 4.1
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4(a)[1]
4(b)(i)[3]
4(b)(ii)[2]
4(c)[2]
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