Self-contained breathing apparatus pressure changes with ambient temperature. As temperature decreases, the pressure inside the cylinder decreases. The relationship between the temperature and the pressure of a gas is defined by the formula "PV" = "nRT". (See Universal gas constant.) What is particularly important to understand from the formula is that the temperature is in kelvins, not degrees Fahrenheit. Consider the freezing point of water at 32 °F (0 °C, 273.15 K) and compare it to 96 °F (35.6 °C or 308.71 K; normal human body temperature is 37 °C). While 96 is arithmetically three times 32, the difference in temperature from a
Centigrade 232 Centigrade 232 Centigrade 232 is an album and a book of poems by English writer and musician Robert Calvert, recorded in 1986 and released in 2007. The poem Centigrade 232 was set to music by Spirits Burning in 2001. Some titles were set to music by Hawkwind and issued as "The Brock/Calvert Project" in 2007. Calvert had regarded himself first and foremost as a poet and writer and his original involvement with the English rock group Hawkwind from 1971 was as a lyricist and narrator of "space-age poetry" at gigs. It was later as a solo performer and his second