it is a base 10 measurement system.
Grams
In the metric system, the Gram, as in kilogram is the standardfor mass measurement
The height of an athlete in metrics is best measured in the metric system, using centimeters or meters. This system provides a more precise and standardized measurement compared to using feet and inches.
Best measurement for a phone book is cm or inches.
it is a base 10 measurement system.
The best unit of measurement for the weight of a phone book would be in pounds or kilograms, depending on your location's preferred system of measurement.
In the English system, Miles. In the Metric system, Kilometers.
Grams
In a closed system, energy can be transferred between different components within the system but does not enter or leave the system. This means the total energy within the system remains constant, in accordance with the principle of conservation of energy.
Because it is best. It is easiest (if you use a base ten counting system) to convert and compare.
A short lived operating system
Energy in an open system can be exchanged with its surroundings, either in the form of heat or work. The total energy of an open system remains constant, but the amount of energy within the system can change as energy is exchanged with the surroundings.
Usually the "thermal energy" will increase since work ON the system adds energy. Thermal energy is really not the best term though. A much better term in thermodynamics would be ENTHALPY.
Heat energy is transferred from warmer objects to cooler objects.
Chemical energy is transformed to mechanical energy and some heat energy
In the metric system, the Gram, as in kilogram is the standardfor mass measurement