Thermodynamic temperature in degrees Rankine are converted to kelvins by "dividing" by 1.8 ("T" = "T" ÷ 1.8). Although the kelvin and Celsius scales are defined using absolute zero (0 K) and the triple point of water (273.16 K and 0.01 °C), it is impractical to use this definition at temperatures that are very different from the triple point of water. ITS-90 is then designed to represent the thermodynamic temperature as closely as possible throughout its range. Many different thermometer designs are required to cover the entire range. These include helium vapor pressure thermometers, helium gas thermometers, standard platinum resistance thermometers (known
Absolute Zero (film) the atmospheric pressure in the affected zone to drop to zero. The remaining atmosphere would move to this zone and soon Earth would have no gaseous atmosphere, with a surface pressure of zero. None of these events occur in the film, although there is a drastic drop of pressure happening at the end of the film. It is impossible to reach absolute zero naturally, nor would a movement of the poles induce any reduction in Earth temperatures. However, this is explained away in the film as being a previously unknown effect. Furthermore, extremely low temperatures, at or near absolute zero,