Which temperature scale is not commonly used in scientific measurements?

The Newton temperature scale is not commonly used in scientific measurements, primarily because it is not widely adopted or employed in scientific research and practice. The Newton scale, developed by Sir Isaac Newton, is based on the expansion of liquids, which is a less consistent method compared to the more standardized temperature scales we use today.

In contrast, the Kelvin scale is the standard in scientific contexts due to its absolute nature, beginning at absolute zero, which is important for thermodynamic calculations. The Celsius scale, based on the freezing and boiling points of water, is also popular in scientific measurements, particularly in fields such as chemistry and environmental science. The Fahrenheit scale, although commonly used in everyday life, especially in the United States, does not see frequent application in rigorous scientific measurements, making it less favorable in professional settings.

Overall, while Kelvin and Celsius are reliable and widely accepted for scientific purposes, and Fahrenheit has its place in general use, the Newton scale lacks the adoption and recognition needed to be considered as a standard in scientific measurements.