Quantities

Quantities

Quantities are divided into two, those are basic quantities and derived quantities.

There are 7 basic quantities, namely: length, mass, time, temperature, electric current, amount of substance, and luminous intensity.

Meanwhile which are included into the derived quantities are area, volume, velocity, force, density, power, work, and other.

Length. In daily life, length is used for measuring distance, thickness of a book, etc. In science length represents the distance between two points. The SI of length is meter (m).

Mass. The amount of materials in the substance is called mass. The mass is determined by the contained materials and fixed state although the object’s position changes. In SI, mass uses fundamental unit of kilogram (kg) and is measured with lever balance.

Time. Time is the duration between two events. For example, daylight is between the sunrise and sun set. The SI unit for time is second (s).

Temperature. Fire is hot but ice is cold. A hot object is said to have high temperature, but a cold object has low temperature. Thus temperature shows the degree of hotness and coldness of an object. The common measuring tool for temperature is a thermometer.