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Topic: converting F to C  (Read 2834 times)

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Offline sasha11

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converting F to C
« on: September 17, 2012, 07:16:58 PM »
45.7°f = what in celsius

Is this the equation I should be using

C = °F-32/1.8
C= 45.7-32/1.8= 7.6

also

45.7 = what is it in absolute scale
1.8(°c) =°F-32
°F= 1.8(°c) +32
°F= 1.8(47.5)+32=  117.5

Offline fledarmus

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Re: converting F to C
« Reply #1 on: September 17, 2012, 08:21:10 PM »
The first part seems to be solved right, although it would look better algebraically with another set of parentheses...

The second part isn't. What is absolute temperature?

Offline DrCMS

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Re: converting F to C
« Reply #2 on: September 18, 2012, 04:15:41 AM »
In the first part you have correctly calculated that 45.7°F is the same temperature as 7.6°C.

In the second part you have calculated that 47.5°C is the same as 117.5°F.  (Note 45.7°C = 114.26°F)

Offline fledarmus

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Re: converting F to C
« Reply #3 on: September 18, 2012, 07:49:43 AM »
But the question in the second part was not "45.7 = what is it in Fahrenheit scale", but "45.7 = what is it in absolute scale"

Offline Borek

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Re: converting F to C
« Reply #4 on: September 18, 2012, 08:14:10 AM »
It is not clear to me if the answer should be given using Kelvin, or Rankine scale. As long as the scale is clearly stated I would accept both answers.

Not that the correct answer in any scale was given so far.
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Offline AWK

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Re: converting F to C
« Reply #5 on: September 18, 2012, 08:34:05 AM »
http://abyss.uoregon.edu/~js/glossary/temperature_scale.html

In the second case - convert to Celsius then to Fahrenheit


printing error corrected
« Last Edit: September 19, 2012, 02:58:08 AM by AWK »
AWK

Offline DrCMS

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Re: converting F to C
« Reply #6 on: September 18, 2012, 09:46:40 AM »
But the question in the second part was not "45.7 = what is it in Fahrenheit scale", but "45.7 = what is it in absolute scale"

Which is why I gave the answer I did to point out that the calculation that the OP had made converted 47.5°C into °F which was clearly not the question asked.

Although what exactly the question being asked was is far from clear as "45.7 = what is it in absolute scale?" is a meaningless half question it could be any of these

45.7°F what is it on the Rankine scale?
45.7°C what is it on the Rankine scale?
45.7K what is it on the Rankine scale?
45.7°F what is it on the Kelvin scale?
45.7°C what is it on the Kelvin scale?
45.7°R what is it on the Kelvin scale?

The OP needs to present a single defined actual question to get any further help.

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