Which of the following scales of temperature has/have their zero set at absolute zero temperature ? 1. Fahrenheit 2. Celsius 3. Kelvin Select the correct answer using the code given below:

Absolute zero is the theoretical temperature at which all molecular motion ceases and thermal energy vanishes [t2][t5]. The Kelvin scale is an absolute thermodynamic temperature scale specifically designed with its zero point (0 K) set at absolute zero [t2][t3]. In contrast, the Celsius and Fahrenheit scales are relative scales based on the physical properties of water. On the Celsius scale, absolute zero is defined as -273.15 °C, while on the Fahrenheit scale, it is -459.67 °F [t2][t9]. Because the zero points of Celsius and Fahrenheit are set at the freezing point of water and a specific brine solution respectively, they do not align with absolute zero [t5][t7]. Therefore, among the options provided, only the Kelvin scale has its zero set at absolute zero temperature [t3][t4].

Sources

1. [1] https://www.nist.gov/blogs/taking-measure/how-low-can-temperature-go-lord-kelvin-and-science-absolute-zero
2. [2] https://spacemath.gsfc.nasa.gov/earth/5Page78.pdf