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5 marksDesign and Use of Thermometers

CAPE Physics Unit 1 · 2015 · Paper 2 · Question 3(d)

An empirical centigrade temperature can be determined and defined in terms of any suitable thermometric property. Select ONE type of thermometer with a suitable thermometric property and describe briefly the procedure and necessary readings to be taken in order to use this thermometer to determine a random temperature, θ.

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  1. 3(a)A resistance thermometer and a thermocouple thermometer are both used at the same time to measure the temperature of a water bath. Explain why the thermometers…[2 marks]
  2. 3(b)(i)What is meant by the term 'absolute zero of temperature'?[1 mark]
  3. 3(b)(ii)State how the 'absolute thermodynamic scale of temperature' differs from other temperature scales.[1 mark]
  4. 3(c)(i)Determine, in kelvin, and to an appropriate number of significant figures, the temperature 50.00 °C.[1 mark]
  5. 3(c)(ii)Determine, in kelvin, and to an appropriate number of significant figures, the change in temperature of the water bath.[1 mark]
  6. 3(e)(i)Calculate, in terms of R_0, the resistance of the wire at 100 °C and at 80 °C as measured by the mercury thermometer.[2 marks]
  7. 3(e)(ii)If the resistance of the wire is used as a thermometric property, what is the temperature reading of the resistance thermometer when the reading on the mercury…[2 marks]

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