1A 1A

Temperature and Thermometer 4 6 Solutions Marks (a) (Correct axes) (Correct data points) (Correct graph) 1A 1A 1A (b) 58 C 1A 7 Solution Marks (a) By proportion, temperature of hot water = 2.37.152.36.10−−100 1M = 59.2 C 1A (b) Let L be the length of the alcohol column at −4 C. By proportion, 2.37.152.3−−L= 010004−−−1M L= 2.7 cm The length of the alcohol column is 2.7 cm. 1A temperature / C length / cm 2 10 16 0 4 6 8 12 14 10 20 30 40 50 60 70 80 90 100

Temperature and Thermometer 5 8 Solutions Marks (a) By TF= 1.8TC+ 32, TC= 813260.−−= −51.1 C 1A −60 F is equivalent to −51.1 C. (b) Since the freezing point of mercury is about −39 C, mercury-in-glass thermometer cannot measure such a low temperature. 1A 1A Alcohol-in-glass can this temperature. (Or other reasonable answers) 1A 9 Solutions Marks (a) When the temperature is 0 C (lower fixed point), the length of the mercury column is 2 cm. 1A When temperature is 100 C (upper fixed point), the length of the mercury column is 10 cm. 1A (b) For a rotary thermometer, the y-axis represents the angle of deflection of the pointer. For a resistance thermometer, the y-axis represents the resistance. 1A 1A length of mercury column / cm temperature / C 8 16 0 4 25 100 10 2

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- Fall '19
- Orders of magnitude, Fahrenheit, Thermometers, Thermometer