The International System of Units (SI)

The International System of Units (SI) is the standard system of measurement used around the world. It consists of seven base units:

Meter (m) - measures length or distance Kilogram (kg) - measures mass or weight Second (s) - measures time Ampere (A) - measures electric current Kelvin (K) - measures temperature Mole (mol) - measures the amount of substance Candela (cd) - measures luminous intensity In addition to these base units, there are many derived units that are used to measure other quantities such as speed, volume, and energy.

To convert between units, you need to know the conversion factor, which is a number that relates one unit to another. For example, to convert meters to centimeters, you need to know that 1 meter is equal to 100 centimeters. So to convert 2 meters to centimeters, you would multiply 2 by 100, which gives you 200 centimeters.

Similarly, to convert kilograms to grams, you need to know that 1 kilogram is equal to 1000 grams. So to convert 3 kilograms to grams, you would multiply 3 by 1000, which gives you 3000 grams.

In some cases, you may need to convert between units that are not directly related. For example, to convert miles per hour to kilometers per hour, you need to know that 1 mile is equal to 1.60934 kilometers and 1 hour is equal to 60 minutes. So to convert 60 miles per hour to kilometers per hour, you would multiply 60 by 1.60934 and divide by 60, which gives you approximately 96.56 kilometers per hour.

Remember, when converting between units, always make sure to keep track of the units and use the correct conversion factor.