What temperature scale uses only positive numbers and has 273 degrees equal to 0 degrees Celsius?

The Kelvin scale is a fundamental temperature scale used primarily in science and engineering, particularly in fields that require precise temperature measurements. It is an absolute temperature scale starting at absolute zero, which is theoretically the point at which all molecular motion stops. On the Kelvin scale, there are no negative values, making it unique compared to other temperature scales.

In the relationship between the Celsius and Kelvin scales, 0 degrees Celsius is defined as being equal to 273.15 Kelvin. When considering 273 degrees as noted in the question, it demonstrates that this point corresponds directly with 0 degrees Celsius, affirming the foundational structure of the Kelvin scale.

This scale is essential in scientific contexts because it allows for simpler calculations involving thermodynamics and other areas where temperature plays a crucial role. The exclusive use of positive numbers simplifies the equations involved, particularly in physics, where absolute temperatures are preferred for calculations involving energy, pressure, and volume.

Understanding this relationship is vital, as it highlights the Kelvin scale's role in bridging practical temperature measurements with the absolute understanding of thermal energy.