When are celsius and fahrenheit the same temperature?

Question

when are celsius and fahrenheit the same temperature?

Answer 1

This should explain it.

http://www.theweatherprediction.com/haby...

Answer 2

I have two answers:

0 Celsius and 32 Farenheit are water fusion temperatures.

I've read that a physicist (whom I've forgotten the name) invented a way to find how hot it is in Farenheit degrees outside during the summer. Count during 15 seconds how many times a cricket chirps, and then add 40 to your number. Verify how much the temperature is in Celsius with a thermometer, and check the Farenheit you've calculated.

I don't know if it is true, but it was in an official math book.

When, according to calculations, both Celsius and Farenheit are around 40 below 0, they are the same temperature.

Answer 3

tossie is correct.  However, I've always got to take the long road around and try a different approach.

Set X = 5/9 x (F-32)  and X = 9/5 x C + 32

and try to isolate F - C = X

5/9 x F - 5/9 x 32 = 9/5 x C + 9/5 x 32

5/9 x F = 9/5 x C + 9/5 x 32 + 5/9 x 32

5/9 x F - 9/5 x C = 32 x (9/5 + 5/9)

((25 - 81) / 45) x F - C + 32 x ((81 + 25) / 45) x (45 / (25 - 81))

F - C = 32 x (106 / 45) x (45 / -56)

F - C = 32 x (106 / -56)

F - C = -60.57

Plugging this value (-60.57) back into both F and C original equations:

5/9 x (F - 32),  5/9 x (-60.75 -32) = -51.528

9/5 x C + 32,  9/5 x (-60.75) + 32 = -77.35

Extrapolating this:

-60.75 / F = -51.528 / -77.350

then

(-51.528) - (-77.350) = 25.822

F then equals -60.75 + 25.822 = -34.928

Which isn't that far off from the expected -40 degrees. The error probably being in rounding the numbers.

Answer 4

F = 9/5 * C + 32

X= 9/5 *X + 32

Solve this you get -40 degrees

Answer 5

negative 40 degrees