The Relationship Between Celsius and Fahrenheit Temperatures

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SUMMARY

The relationship between Celsius and Fahrenheit temperatures is defined by the formula F = 1.8C + 32. A change of 20 degrees Celsius corresponds to a change of 36 degrees Fahrenheit, calculated by the conversion factor of 1.8. Additionally, a temperature of 20 degrees Celsius is equivalent to 68 degrees Fahrenheit, not 70 as mistakenly noted. The discussion clarifies the correct conversions and emphasizes the importance of understanding temperature change versus absolute temperature values.

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  • Understanding of temperature scales (Celsius and Fahrenheit)
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Dx
A temp change of 20 degrees C corresponds to a temp change of

68degrees F

i got this one wrong? what's up with that?
 
Last edited by a moderator:
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Well, its asking for a change...

20 deg C=68 deg F...but...

Lets say the change in C is from 0 to 20, then the change in F is from 32 to 68, giving your answer of (68-32)=36
 
Water freezes at 32 degrees F= 0 degrees C
Water boils at 212 degrees F= 100 degrees C
so that 212-32= 190 degrees F spans as much as 100 degrees C so each degree C corresponds to 190/100= 1.9 degrees F.

A change of 20 degrees C corresponds to a change of 20(1.9)= 38 degrees F.

(Or, you could have argued that 20 degrees C is 1/5 of the way from freezing to boiling and so corresponds to (212-32)/5= 190/5= 38 degrees F.

(Oh, by the way, a temperature of 20 degrees C is 70 degrees F, not 68. The general formula is F= 1.9C+ 32.
 
Originally posted by HallsofIvy
Water freezes at 32 degrees F= 0 degrees C
Water boils at 212 degrees F= 100 degrees C
so that 212-32= 190 degrees F spans as much as 100 degrees C so each degree C corresponds to 190/100= 1.9 degrees F.

A change of 20 degrees C corresponds to a change of 20(1.9)= 38 degrees F.

(Or, you could have argued that 20 degrees C is 1/5 of the way from freezing to boiling and so corresponds to (212-32)/5= 190/5= 38 degrees F.

(Oh, by the way, a temperature of 20 degrees C is 70 degrees F, not 68. The general formula is F= 1.9C+ 32.

Thanks for the info Ivy and dav2008.
BTW...9/5 = 1.8C + 32 not 1.9 and my answer of 68 degrees is right.

Thanks!

Dx :wink:
 

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