Physics · Oct / Nov 2020 · Paper 21 · Question 9
5054
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A small glass measuring cylinder of oil is placed inside a freezer where the temperature is –18 °C. Fig. 9.1 shows how the temperature of the oil varies with time t. 20 10 0 –10 –20 14 000 12 000 t / s 10 000 8000 6000 4000 2000 0 temperature / °C Fig. 9.1 Fig. 9.1 shows that it takes 700 s for the temperature to decrease from 20 °C to 10 °C but that it takes 1900 s to decrease from 0 °C to –10 °C.
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9(a)[3]
9(b)[3]
9(c)(i)[1]
9(c)(ii)[3]
9(d)(i)[2]
9(d)(ii)[1]
9(e)[2]
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