Question

Why is -273 degree centigrade the lowest possible temperature?

Answer 1

-273 degree centigrade is the lowest possible Temperature because random motion of molecules ceases at that Temperature an can't be further cooled down.

Answer 2

At the physically impossible-to-reachtemperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale.
that's why this is the lowest temperature


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