What are units?
Units are standards for the measurement of physical quantities. We know Physical quantities are those properties of a substance that can be measured or observed without changing the identity or composition of the substance.
There are seven fundamental physical quantities:
|Fundamental physical quantities||S.I. unit||Symbol|
|5. Amount of substance||mole||mol|
|6. Electric Current||ampere||A|
|7. Luminous intensity||candela||cd|
There are several other physical quantities that are derived from fundamental physical quantities and are known as “derived physical quantities”. For example Area, Volume, Pressure, etc.
Let us look at conversion of units of Physical quantities that are used frequently in Chemistry and Physics numerical problems.
This video covers the conversion of units of:
So, we have learned the conversion of units very well. Here are conversion tables listed for different units and their conversion:
|Unit Conversion of Length|
|Unit Conversion of Mass|
|Unit Conversion of Volume|
|1 kiloliter or 1||liters|
|1 milliliter or 1||liter|
|Unit Conversion of Pressure|
|1 atmospheric pressure||101325 pascal|
|1 atmospheric pressure||760 mm of Hg|
|1 atmospheric pressure||760 torr|
|1 atmospheric pressure||1.013 bar|