Gravitation – Gravitation oftentimes also termed as Gravity is a force which found among all material objects in the universe. For any two objects or particles having non-zero mass, the force of gravity tends to attract them toward each other. Gravity works on objects of all sizes, be these subatomic particles or clusters of galaxies.
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Monday, December 4, 2017
Work, Energy and Power
Work - When a force acts upon an object and displaces it from its original position, it is said that work was done upon the object. There associates three key component to work - force, displacement, and reason or source.
Motion
Scalars - Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
Examples of Scalar Quantities - mass, length, temperature, energy, pressure, volume, electric charge, space-time interval, invariant mass
Vectors - Vectors are quantities that are fully described by both a magnitude and a direction.
Examples of Scalar Quantities - mass, length, temperature, energy, pressure, volume, electric charge, space-time interval, invariant mass
Vectors - Vectors are quantities that are fully described by both a magnitude and a direction.
Name and Symbols of Different Physical Terms, Descriptions and SI Units
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.
|
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
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