| |
| | Fahrenheit - Gurupedia (Site not responding. Last check: ) |
 | | In this scale, the freezing point of water is 32 degrees Fahrenheit (written 32°F), and the boiling point is 212 degrees, placing the boiling and melting points of water 180 degrees apart. |
 | | Thus the unit of this scale, a degree Fahrenheit, is 5/9ths of a kelvin (or of a degree Celsius), and -40 degrees Fahrenheit is equal to -40 degrees Celsius. |
 | | His measurements were not entirely accurate, though; by his original scale, the actual freezing and boiling points would have been noticeably different from 32°F and 212°F. Some time after his death, it was decided to recalibrate the scale with 32°F and 212°F being the actual freezing and boiling points of plain water. |
| www.gurupedia.com /f/fa/fahrenheit.htm (361 words) |
|