Eli5 Why 80 degree Celsius is not four times as hot as 20 degrees celsius?
In: 0
Because we chose an arbitrary point to be zero. The freezing point of water.
If 0C was the coldest thing anything could possibly be, then 80C would be 4x hotter than 20C. But we know that the real zero (absolute zero) is 0Kelvin or -273.15 Celsius. Your example in Kelvin (which has the same degrees as Celsius but with a different starting point) would be 353K vs 293K
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