वह तप ज्ञात किजिये जो सेल्सियस (c°) व फेरनहाइत में समान हो
Answers
Answer:
which chapter
Explanation:
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Answer:
-40°C and -40°F
Explanation:
I believe "the reason" for -40 F = -40 C is the history behind Fahrenheit and Celsius scales.
Fahrenheit scale defined by Daniel Gabriel Fahrenheit uses 0 degree as the lowest temperature he could consistently obtain using brine, and the highest temperature of 96 degree with that of human body. (Source: . God knows why 96 is the highest temperature. Maybe, he would have used 100 as the human body temperature, and the experiment could have been done on a guy with fever. :P )
Celsius scale, as we all know, uses 0 as the freezing temperature of water at atmospheric pressure, and 100 as the boiling temperature.
Once the Celsius scale is defined, we can see the mapping of Celsius to Fahrenheit as:
0C = freezing temperature of water = 32 F (as measured by a Fahrenheit thermometer)
100C = boiling temperature of water = 212 F (as measured by a Fahrenheit thermometer)
Based on this data, the conversion equation could be constructed, that has a linear adjustment of -32, followed by and a scaling factor of (100 - 0) / (212 - 32) = 5/9 to convert F to C.
Once you have the linear (conversion) equation:
Tc = (Tf - 32) * (5/9), you can solve that -40 F = -40 C.