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Examples of thermometric properties:

  • Length of a column of liquid, e.g. mercury and alcohol thermometers,
  • Electrical resistance (see chapter 23),
  • Colour (colour  'strips'  are sometimes used by nurses and placed against a person's forehead),
  • Emf of a thermocouple (emf is a fancy word word for  'voltage' ),
  • Volume of gas at constant pressure,
  • Pressure of a gas at constant volume.

Disagreement between thermometers

Two different types of thermometer will give slightly different readings at the same temperature.*
This means we need to agree on one particular thermometer to have as a standard.

(This is an answer to the common exam question: why do we need to have a standard