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2006-08-26 02:12:14 · 7 answers · asked by jacque c 1 in Health Other - Health

7 answers

Celsius, Kelvin, Fahrenheit

2006-08-26 02:15:41 · answer #1 · answered by Klebao 4 · 0 0

There are three temperature scales in common usage today. The SI (metric) system uses the kelvin (K) as it's standard measure with degrees Celcius (oC) as a measure derived from the kelvin (it's sort of the other way around but that's a different story - see here). Last and definitely least is the old measure of degrees Fahrenheit (oF).

As at the beginning of 2005 the SI system had been adopted to some extent in virtually every country except the United States, Liberia and Myanmar (hint, hint) and the fahrenheit temperature scale is only used routinely in the US and Jamaica - it makes a good trivia question - What is it that the United States has in common with Jamaica and nowhere else in the world?.

Kelvins are used almost exclusively in the scientific world. It is the same as the Celsius system except that it can never be negative. This is because it is zero when there is absolutely no heat (called Absolute Zero - the temperature at which every molecule is absolutely still in relation to each other). It is -273.15o Celsius at absolute zero, so to convert from Celsius to Kelvin you add 273.15.

Celsius was creating by Mr Celsius after choosing zero to be the freezing point of pure water and the boiling point at sea level to be 100.

Mr Fahrenheit on the other hand chose zero to be the temperature of the coldest material he could reproduce in his 18th century laboratory. This was ice melting in water saturated with common salt. He then chose 96 (because it is the third doubling of 12, i.e. 12*2*2*2) as the temperature of his wife's armpit. Who else's armpit is that famous?

2006-08-26 02:19:46 · answer #2 · answered by skyeblue 5 · 1 0

Hahaha, did you see that sammy wrote 'degree'.

Celsius is most logical for every day activities. 0 degress celsius is the temperature at which water freezes. 100 degrees is when it boils.

I'm not sure of the origins of Farenheit, but it is slowly being replaced by Celsius. 32 degrees farenheit is 0 degrees celsius.

The conversion to get from farenheit to celsius, you should multiply by 5/9 and then subtract 32. To get from celsius to farenheit, you should add 32 and then mulitply by 9/5.

Kelvin is a scientific temperature scale that starts at absolute zero. This is the temperature when everything stops moving, even the electrons in an atom. It has the same scale as Celsius, just that it is much lower. 0 degrees kevlin, is equal to -273.15 degrees Celsius.

There is also some other unit called electronvolts.

The electronvolt (symbol eV, or, rarely and incorrectly, ev) is a unit of energy. It is the amount of kinetic energy gained by a single unbound electron when it passes through an electrostatic potential difference of one volt, in vacuum. In other words, it's equal to one volt times the magnitude of charge of a single electron. The one-word spelling is the modern recommendation although the use of the earlier electron volt still exists.

One electronvolt is a very small amount of energy:

1 eV = 1.602 176 53 (14)×10−19 J. (Source: CODATA 2002 recommended values)


Can't imagine you would need to use either of the last two, unless you worked in that field, in which case you would probably know already.

Hope this answers your question.

2006-08-26 02:26:45 · answer #3 · answered by Chris 3 · 0 0

Kelvin, Fahrenheit, Celsius

2006-08-26 02:23:13 · answer #4 · answered by Anonymous · 0 0

Celsius, fahrenheit, kelvin

2006-08-26 02:18:29 · answer #5 · answered by Josef G 2 · 0 0

I assume you refer to the measurement systems, there are Fahrenheit (English), Celsius (Metric) and Kelvin (scientific).

2006-08-26 02:16:27 · answer #6 · answered by Tristansdad 3 · 1 0

degree, farenhite, centigrate i think.......

2006-08-26 02:15:52 · answer #7 · answered by sammy 1 · 0 1

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