A weather station on the top of a mountain reports that the temperature is currently 0°C and has been falling at a constant rate of −8°C per hour. What was the temperature 1 hour ago?
Absolute zero, the lowest temperature possible, is defined as being exactly 0 K and −273.15 °C. Until 19 May 2019, the temperature of the triple point of water was defined as exactly 273.16 k
