Unite Quantity Document For Free

Identification of fundamental quantities Length (meter) Mass (kilogram) Time (second) Electric current (ampere) Thermodynamic temperature (kelvin) Amount of substance (mole) Luminous intensity (candela)

In physics, a physical quantity is any physical property of a material or system that can be quantified, that is, can be measured using numbers. A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit.

A unit is a known measure of a physical quantity with which the physical quantities of the same kind are compared. For example centimeter, meter and inch are units of physical quantity length.

Units of measure can be written as symbols, words, or abbreviations. For basic units of measurement, use words: 25 pounds, 12 inches. For derived units of measure ? ones formed using a calculation ? use symbols: 38mph, 27ft/s2.

SI Units Length - meter (m) Time - second (s) Amount of substance - mole (mole) Electric current - ampere (A) Temperature - kelvin (K) Luminous intensity - candela (cd) Mass - kilogram (kg)

Noun,plural quan·ti·ties. a particular or indefinite amount of anything: a small quantity of milk; the ocean's vast quantity of fish. an exact or specified amount or measure: Mix the ingredients in the quantities called for.

Quantity: A property that is measured [e.g. mass, length, time, volume, pressure]. Unit: A standard quantity against which a quantity is measured [e.g. gram, metre, second, litre, pascal; which are units of the above quantities]. Chemists measure various quantities.

The units and their physical quantities are the second for time, the metre (sometimes spelled meter) for length or distance, the kilogram for mass, the ampere for electric current, the kelvin for thermodynamic temperature, the mole for amount of substance, and the candela for luminous intensity.