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