Kilogram is the SI base unit for mass. It is equal to the mass of the international prototype of the kilogram, a platinum-iridium standard kept at the International Bureau of Weights and Measures. The symbol for kilogram... More »

Density is mass per unit volume, and the SI (or Systeme International) unit is kilogram per cubic meter, abbreviated as kg/m^3. This means that finding the density of a particular object requires dividing its mass by its... More »

The standard unit of measurement for mass is a gram, as designated by the International System of Units (SI). While many industries continue to measure mass in ounces, pounds and tons in the United States, metric measure... More »

The metric system is different from SI or International System of Units in that it has only three base units, whereas the SI has seven base units. Also, the SI is a modern system of measurement that is based on the older... More »

Density is mass per unit volume, and the SI (or Systeme International) unit is kilogram per cubic meter, abbreviated as kg/m^3. This means that finding the density of a particular object requires dividing its mass by its... More »

The International System of Units (SI) identifies "second" as the base unit for time. It is determined using radiation periods for the cesium 133 atom. More »

The SI unit for force is the newton with the symbol N. Some other SI units related to force are the meter for length, kilogram for mass and second for time. More »