Base quantity
|
Symbol
|
Description
|
SI unit
|
Length
|
l
|
The one dimensional extent of an object.
|
metre (m)
|
Matter
|
m
|
The amount of matter in an object.
|
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Monday, December 4, 2017
Name and Symbols of Different Physical Terms, Descriptions and SI Units
Important Physics Discoveries in Chronology Order
- 1687 - Laws of motion and law of gravity: Newton
- 1782 - Conservation of matter: Lavoisier
- 1785 - Inverse square law for electric charges confirmed: Coulomb
- 1801 - Wave theory of light: Young
Inventions, Inventor, Country and Year
- Adrenaline: (isolation of) John Jacob Abel, U.S., 1897.
- Aerosol can: Erik Rotheim, Norway, 1926.
- Air brake: George Westinghouse, U.S., 1868.
- Air conditioning: Willis Carrier, U.S., 1911.
List of Scientific Instruments and Uses
- Absorptiometer - Instrument for measuring solubility of gases in liquids
- Accelerometer - Instrument for measuring acceleration or vibrations
- Acetimeter - Instrument for measuring strength of vinegar
- Acidimeter - Instrument for measuring concentration of acids
- Actinograph - Instrument used to calculate time of photographic exposure
Units
Unit: A unit of measurement is a definite magnitude of a physical quantity, defined and adopted by convention and/or by law, that is used as a standard for measurement of the same physical quantity. Any other value of the physical quantity can be expressed as a simple multiple of the unit of measurement.
Chemistry Fun and Facts
- The only elements that are liquid at room temperature are bromine and mercury.
- Water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.
- If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.
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