#19 Units for measurement-Metrics system Vs Imperial System

Units for measurement         

Today we will talk about an important topic related to engineering and that is Units for measurement.  Basically units of measure are present in two categories: Imperial Units and Metric units.

What Is the Imperial System?

          The British Imperial System was the official system of weights and measures in the United Kingdom from 1824 until they adopted the metric system in 1965. The Imperial system standardized measurements for units like pound and foot that had different meanings in different places. The United States Customary System is based off British Imperial units that existed previous to the Weights and Measures Act of 1824.

Imperial Units

The basic unit in the Imperial and U.S. customary systems is the:-

Length=                       (Inch-in, ft, Yard-yd, Mile-mi)
Weight=                       (Ounce-oz, Pound-lb, Stone-st,)
Area=                           (in², ft², yd², mi², Acre)
Liquid Volume=          (Gills, Pints, Quart, UK Gallon)
Volume=                      (in³, ft³, yd³,)
Temperature=             (Fahrenheit-ºF)
Energy=                       (British Thermal Unit-BTU)
Pressure=                    (Pounds per Square Inch-PSI)

           We know that the standard unit of length in imperial system  is ‘feet’ which is written in short as ‘ft.The different units of length are given here:

What Is the Metric System?

          Based on the meter for length and kilogram for mass, the metric system was first adopted in France in 1795. After the French Revolution, the government asked scientists to look into replacing thousands of different traditional measurement systems with one that could unify the country. The meter was developed by measuring one-ten-millionth of the quadrant of Earth’s circumference running from the North Pole to the equator, through Paris. The new unit, equal to about thirty-nine inches, was called a meter, and all measurements were based upon it.

          The metric system, or SI (Systeme International), is based off this original meter and currently the official system of measurement for almost all countries, including the countries of the former British Empire, such as Australia. (Canada converted to the metric system in the ’70s and ’80s.) The SI units—fundamental units not based on any other units—are meter, kilogram, second, ampere (electricity), Kelvin (although Celsius is a more practical measurement for nonscientific applications), mole (chemistry), and candela (luminous intensity).

 

Metric Units

The basic unit in the Metric system & SI System is the:-

Length=                       (mm, cm, Meter-m, kilometre-km, Light Year)
Weight=                       (mg, g, kg, Tonne-t)
Area=                           (cm², km², m², Hectare, Are)
Liquid Volume=          (Litre-l, Millilitre-ml)
Volume=                      (cm³, m³,)
Temperature=             (Kelvin-K, Celsius-ºC)
Energy=                       (Joule-J)
Pressure=                    (Pascal-Pa)

          We know that the standard unit of length is ‘Meter’ which is written in short as ‘m’.

The different units of length are given here:

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