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Revision:Thermometers

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TSR Wiki > Study Help > Subjects and Revision > Revision Notes > Physics > Thermometers


Contents

Temperature

  • A measure of the hotness of a body. The mean kinetic energy of its particles.


Internal Energy

  • The energy contained in a body due to the potential energy and kinetic energy of its particles. It is increased if work is done on it or energy is transferred to the body.


Heat

  • Energy transferred due to a difference in temperature.


Thermal Dynamic Scale

  • Upper fixed point = triple point of water = 273.16K
  • Lower fixed point = absolute zero = 0K
  • Measure in Kelvins - symbol K


Triple Point of Water

  • The temperature at which water can exist in all three states (solid, liquid and gas) at the same time in equilibrium. (273.16K)


Centigrade Scale

  • Upper fixed point = boiling point of water = 100°C
  • Lower fixed point = ice point of water = 0°C
  • Measured in °C


Fahrenheit Scale

  • Upper fixed point =96°F
  • Lower fixed point = 32°F
  • Measured in °F


  • Converting Kelvins into °C: Minus 273. (for the other way round do the opposite i.e. +273). The Celsius scale is derived from the absolute scale and uses the same fixed points.
  • A thermometric property is a property of a thermometer that varies continuously with temperature.


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