Difference between revisions of "Fahrenheit"
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| − | Fahrenheit temperature is the temperature used in | + | Fahrenheit temperature is the temperature scale used in [[United States of America]] for ordinary purposes. It was used in most English-speaking countries until the 1960s. Most other countries use [[Celsius]], which is part of the ''International System of Units'' (the "metric system"). |
| − | Fahrenheit temperature was invented by Daniel Gabriel | + | The Fahrenheit temperature scale was invented by Daniel Gabriel Fahrenheit in 1724. He decided that the zero point should be the temperature of a mix of ammonium chloride and ice, because this was the very coldest temperature he could achieve in his laboratory. He decided to set 100 at the temperature of the human body. (Either he made his measurement inaccurately, or he was running a very slight fever at the time). On this scale, it turns out that water freezes at 32 degrees and boils at 212 degrees Fahrenheit. |
| − | [[Ray Bradbury]] wrote a book called | + | [[Ray Bradbury]] wrote a book called "Fahrenheit 451" about burning books in the future. 451°F is, he said, the temperature at which book paper burns. |
Revision as of 01:12, December 22, 2006
Fahrenheit temperature is the temperature scale used in United States of America for ordinary purposes. It was used in most English-speaking countries until the 1960s. Most other countries use Celsius, which is part of the International System of Units (the "metric system").
The Fahrenheit temperature scale was invented by Daniel Gabriel Fahrenheit in 1724. He decided that the zero point should be the temperature of a mix of ammonium chloride and ice, because this was the very coldest temperature he could achieve in his laboratory. He decided to set 100 at the temperature of the human body. (Either he made his measurement inaccurately, or he was running a very slight fever at the time). On this scale, it turns out that water freezes at 32 degrees and boils at 212 degrees Fahrenheit.
Ray Bradbury wrote a book called "Fahrenheit 451" about burning books in the future. 451°F is, he said, the temperature at which book paper burns.