Physical World and Measurement

At the 11th General Conference on Weights and Measures held in Paris, France, in 1960, scientists recognised the importance of standard units for physical quantities at the end of World War II. As a result, they developed a set of metric systems for uniform measurements. International System of Units, SI units, or multinational units are […]

The bar is commonly used as a unit of pressure in many nations. It’s neither a SI nor a cgs unit, although it’s widely recognised for use with SI units. The bar is a pressure unit that gives   100 kilopascals. It’s about the same as the air pressure at sea level on Earth. A

To indicate weights and measures of substances, we utilise numbers and units. A number alone is insufficient to convey the amount of material or the length of given objects. Units must accompany numbers. A unit is a standard for measuring a quantity of the same kind. They are derived units and prefixes as well. The

Identifying the attributes or dimensions of a material thing and establishing the numerical value of physical quantity with that quantity is known as measurement. It is the application of a standard scale or measuring instrument to an item, sequence of items, events, or circumstances by established protocols by people familiar with the device or scale.

To measure any given object, we need its unit. It isn’t easy to relate and understand the quantitative value without units. In 1960 with the rapid growth of science and technologies, scientists decided to have a universal system of units to avoid confusion due to units. Thus, they decided on the International System of units

Numbers and standard units express an amount of substance for the quantity of any given substance. A number alone is not sufficient to express the quantities. Units must be attached to the numbers. A unit is a standard used to measure a quantity of the same kind. A metre is a unit used to measure