Rankine Thermometer 672R

The Rankine scale is an absolute temperature scale, meaning it starts at absolute zero, where all molecular motion stops. It is similar to the Kelvin scale but uses Fahrenheit degrees rather than Celsius. A Rankine thermometer would be a thermometer that measures temperature using the Rankine scale.

The key points for the Rankine scale are:

1. Absolute Zero: The Rankine scale begins at 0 °R, which corresponds to absolute zero (the theoretical point where all molecular motion ceases).
2. Unit of Temperature: The unit of temperature in the Rankine scale is the Rankine degree (°R), which is equivalent in size to a Fahrenheit degree.
3. Conversion Formula:
   • To convert from Fahrenheit to Rankine:
     $T(°R)=T(°F)+459.67$
   • To convert from Rankine to Fahrenheit:
     $T(°F)=T(°R)-459.67$
4. Use: The Rankine scale is often used in thermodynamics and engineering, especially in the United States. It’s particularly useful in the analysis of thermodynamic cycles like those in steam engines or refrigeration systems.

For example:

• 32 °F (freezing point of water) is 491.67 °R on the Rankine scale.
• 212 °F (boiling point of water) is 671.67 °R on the Rankine scale.