Changes

The temperature -40 is the same in both scales. This gives an alternative conversion rule: to convert in ''either'' direction, first add 40; then multiply by 5/9 for °F->°C or 9/5 for °C->°F; then subtract 40.

The temperature -40 is the same in both scales. This gives an alternative conversion rule: to convert in ''either'' direction, first add 40; then multiply by 5/9 for °F->°C or 9/5 for °C->°F; then subtract 40.

[[Ray Bradbury]] wrote a book called ''[[Fahrenheit 451]]'' about burning books in the future. According to Bradbury's research (which involved calling a local fire station on the telephone), 451°F is the temperature at which book paper burns.

The title ''[[Fahrenheit 451]],'' a famous science-fiction novel by [[Ray Bradbury]], refers to the temperature at which book paper burns, according to Bradbury. (Bradbury is said obtained this figure simply by calling a local fire station on the telephone).{{fact}}. The novel concerns a dystopian future in which imaginative fiction is considered subversives, and the job of "firemen" is to locate and burn books.

[[Category:Units of temperature]]

[[Category:Units of temperature]]