grams
Kelvin
Most commonly reffered to would be RPM - Rounds Per Minute. The speed of which it is rotating.
The "L" is in the metric system for liter, which is most commonly used with liquids.
contrast ratio
the metric system
Among units of measurement for angles, the degree and the radian are the most commonly used, by far.
The "centimeter" is the most commonly used.
When you estimate something the word that is commonly used the most is "about". This word is saying that it is not an exact measurement.
The most commonly used system of measurement in science is the International System of Units (SI). It is based on seven base units, such as meters for length, kilograms for mass, and seconds for time, and is universally recognized and accepted by the scientific community.
Polarimetry is the measurement and interpretation of transverse waves. The most common polarimetry waves are electromagnetic waves (e.g. radio or light waves).
The system of measurement commonly used in most of the world is the SI or Metric system. Aside from that one, there are various others that are used in small areas by relatively few people. One of those is the "English" system, used in Burma, Liberia, and the USA.
The scientist should use the Celsius (°C) unit of measurement to record temperature in her study. This is the most commonly used unit for temperature in scientific research and it is easy to interpret and compare with other data.