- #1

Dx

A temp change of 20 degrees C corresponds to a temp change of

68degrees F

i got this one wrong? whats up with that???

68degrees F

i got this one wrong? whats up with that???

Last edited by a moderator:

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter Dx
- Start date

- #1

Dx

68degrees F

i got this one wrong? whats up with that???

Last edited by a moderator:

- #2

dav2008

Gold Member

- 609

- 1

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

- #3

HallsofIvy

Science Advisor

Homework Helper

- 41,847

- 966

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.

- #4

Dx

Originally posted by HallsofIvy

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

Share: