2 thermometers are calibrated one in celsius one in F. At what temp. are readings the same?

Question

Answer in K.

Answer 1

-40 degrees is the same temperature in F or C
(233.15 K)

Answer 2

Oh, answer in kelvins. I like that.

Well, you know that (9/5)C + 32 = F

And you know that at a certain point, F = C

So you can do a little algebra.

9/5 C + 32 = F
9/5 C + 32 = C (C and F are equal at a certain point, and you want kelvin, which is easiest to get from celcius)

Move the 32 from the left side to the right by subtracting
9/5 C + 32 - 32 = C - 32

9/5 C = C - 32

Subtract C from both sides to put all of your variables on the left

9/5 C - C = -32

You know that 1 c = 5/5 c
9/5 C - 5/5 C = -32

Combine like terms
4/5 C = -32

divide both sides by 4/5

C = -40

So when C = -40, then C = F. The two are equivalent at 40 below.

And since Kelvin is just C + 273.15

The two temperature scales are equal at -40 + 273.15 K, or 233.15 K

Answer 3

-40 degrees.

To change Degrees celsius in degrees Fahrenheit, the formula is:
F = 1.8C +32

so, if the readings are the same:
F=C
F=1.8F+32
-0.8F = 32
F= -40 degrees

Answer 4

0 degrees

Answer 5

At -40°
They cannot be compared using Kelvin.
Kelvin corresponds with °C.
°F corresponds with Rankine.
-40°C = 233.15 Kelvin (K).
-40°F = 419.67 Rankine (R).

(If the 'Thumbs Down' merchant, knows better ...prove it and explain yourself !!).

Answer 6

well -40C and -40 F are the same
-40+273.15 = 233.14K

Answer 7

-40 degrees...................and that would be 233 Kelvin

Answer 8

-40C

[ 233.15K ]