The temperature of -273.15 °C, -459.69 °F, or 0 K; thought to be the temperature at which molecular motion vanishes and a body would have no heat energy.
The wet bulb temperature Tw, is the temperature of the moistenrd thermometer during measurement of relative air humidity with the Aspirations-Psychrometer. A thermometer
covered with a moistened wool wick is exposed to a constant airflow. After some time, temperature equilibrium is reached. Together with ambient temperature and total
pressure, the relative humidity can also be calculated from the wet bulb temperature