They are equal at -40° (minus 40 degrees).
...because if we convert the readings of Celsius and Fahrenheit, we will have:
Celsius to Fahrenheit (-40°C x 9/5) +32 = -72 + 32 = -40°F
Fahrenheit to Celsius (-40°F - 32°) x 5/9 = (-72 )x 5/9 = -40°C
Algebraically (for the numerical value T)
The formula for some identical temperature T would be
T(°F) = T(°C) and T = (9/5 T + 32) yields 4/5 T = -32 and T = -40
(see related question)
it is -40 degrees, Tc = (5/9)*(Tf-32); Tc = temperature in degrees Celsius, Tf = temperature in degrees Fahrenheit
putting Tf=-40 we get Tc -40,
so minus forty (-40) is only the value at which the both temp. ars equal.
-40
kelvin=celsius+273 Celsius=0.55(F-32) Fahrenheit=(1.8*celsius)+32
0
Above -40, a number in Celsius is hotter than the same number in Fahrenheit.
The temperature when both the Celsius and Fahrenheit scales are the same is - 40 degrees.
At -40 degrees.
Formula: Fahrenheit = (Celsius x 1.8) + 32
Fahrenheit and Celsius
-273.15 Celsius or -459.67 Fahrenheit.
I suggest you convert each of the Fahrenheit temperatures to Celsius (or the other way round, each of the Celsius temperatures to Fahrenheit), and then compare.
There are two reasons for this. The first is that a Fahrenheit degree is smaller than a Celsius degree. Four Celsius degrees is the same size as nine Fahrenheit degrees. The second reason is that 32 degrees Fahrenheit is zero degrees Celsius. If you put those two ideas together you figure out that -40°F = -40°C.
-40
Celsius and Fahrenheit scales are equal at -40o Kelvin and Fahrenheit scales are equal at 574.25o
Temperatures in that range are associated with stellar fusion, and are usually expressed in Kelvin, which is practically the same as Celsius for those high temperatures. However, 15 million °C would equal 27 million °F. Fahrenheit is almost never used for such high temperatures. Celsius and Kelvin are normally used. But 15 million degrees on the Celsius scale would be approximately 27 million degrees on the Fahrenheit scale.
1 Fahrenheit degree = 5/9 of one Celsius degrees 1 Celsius degree = 1.8 Fahrenheit degree There is no constant ratio between the °F and °C numbers for the same temperature, because their zeros are at different temperatures. A Celsius number less than -40° is colder than the same Fahrenheit number. A Celsius number more than -40° is warmer than the same Fahrenheit number. And -40° is the same actual temperature in both °F and °C.
In the US, temperatures are typically reported in Fahrenheit
Celsius(C) , Fahrenheit(F) , Kelvin(K), or Rankine