What is the logic behind substracting 32 from a fahrenheit temperature , then *5 and then / 9 to get C temp?

Answer 1

Because of the difference in the two scales: Celsius goes from 0 to 100, and Fahrenheit goes from 32 to 212 from freezing to boiling. You have to account for the difference in the starting temperature (0 and 32) as well as the extra 80 degree difference in the Fahrenheit scale. Which is how they arrive at that odd equation.

Answer 2

No knows for certain why Gabriel Farenheit came up with his system for measuring temperatures, but there are several theories. However, most authorities agreed he didn't like using negative temperatures which were common in the Romer scale.

Version 1 - He took the lowest temperature he could measure during the winter of 1708-1709 in Gdansk, Germany - and set that as 0 degrees - He then set his body temperature as 100 degrees. Farenheit divided his scale into 12 divisions, and then subdividing these divisions into 8 parts. It also made Water freeze at 32 degrees and water boil at 212 degrees - 180 degrees apart.

Version 2 - Farenheit set 0 as the temperature both equal measures of ice and salt would melt - and 96 as the temperature of blood (in this case horse blood) - also dividing the scale by 12, and then subdividing by 8.

Version 3 - Farenheit took the Romer scale and multiply the standards by 4 to eliminate fractions.

Version 4 - There is a theory that Farenheit was a Freemason - and Freemason's have 32 degrees of enlightenment.

There are other theories - but we do know that Farenheit is 5/9s the size of celsius -

Answer 3

The celcius scale is designed to conicide with the metric system. Thats why it is also sometimes called "centigrade".

We do the conversion only because the Farenheit scale is the one that most people in the united states understand. We know the difference between 95 degrees and 35 degrees when you are discussing the farenheit scale but when you compare 36 degrees to 7 degrees on the celcius scale it is much harder for us to comprehend that those temperatures are very extreme from one and other.

Answer 4

Your on a vacation to a foreign country and get sick. You go to a local doctor and he takes your temperature in centigrade degrees. But you only know that 98.6 degrees Fahrenheit is normal for you. That's the logic behind being able to convert Centigrade temperatures into Fahrenheit temperatures and vice versa. Centigrade degrees may be like a foreign language to you, so you have to have the foreign language translated to your language of Fahrenheit degrees.

Answer 5

We have two scales because Mr. Farenheit and Mr. Celsius did not talk to each other while doing their reserach..

The 9/5 part is because one degree rise for the Celsius scale is not equivalent to an equal rise in the Celsius scale.

eg
Water freezes at 100 C and 212 F
Water boils at 0 C and 32 F

The addition part (or subtraction if converting to Celsius) comes in to take care of the 0 degree being converted from...

We also have the Kelvin scale.. scientificall most appropriate...
Just subtract 273.15 (approx)from the Kelvin scale to get teh temp in Celsius

Answer 6

The lesson is that marriage is not a temporary thing and should not be entered into lightly. Notice the unfaithfulness mentioned. This, and abuse are the only real reasons for divorce. Otherwise, those divorced for other reasons are to be considered still married in the eyes of God. This may seem inconvenient, and you may have views that Marriage is something to be taken lightly, and 'happiness' is much more important. It isn't this way with God. The bottom line, don't marry someone and divorce them for petty reasons and you have no problems. Besides what ****** would marry a woman who would divorce you (or you would want to divorce) at the drop of a hat?

Answer 7

F 32 freezing 212 Boiling = 180

C freezing 100 boiling = 100 difference


100/180 = 5/9

Plus 32

Answer 8

Because Americans haven't woken up to the reality of metric's superiority.

100C = water boils
30C = summer day
20C = room temperature
10C = a spring day
0C = water freezes

1 litre of water weighs 1 kilogram and is a cube 10cm x 10cm x 10cm.

1 metric ton of water (1000kg = 2200lb.) is a cube 1m x 1m x 1m.

Show me *anything* in imperial measurements that is as consistent and sensible, and I'll eat a dead frog.

Imperial/linear measurement is screwy and outdated, and metric makes sense. Anyone who says otherwise has never taken a high school science class.

Answer 9

that is simply the way to convert from one temperature scale to another one.
Personally I don't understand why the farenheit system was set up the way it was.

Centigrade system was set up on the boiling and freezing points of water.

at zero temperature centigrade, it is also 32 degrees farenheit. water freezes.

Can you name the temperature system that is based on absolute zero degrees ???

tom

Answer 10

to get fahrenheit just double the C temp and add 26.
This will get you really close.