For all the physics enthusiasts out there here are out picks for the tp 10 crucial physics theories .
10Falling of different size objects accelerate at the same rate.
Theory by: Galileo Galilei in 1589
To disprove Aristotle’s theory of gravity, Galileo dropped two balls of different weights from the top of Leaning Tower of Pisa.
9Everything is composed of atoms
Theory by: Leucippus and Democritus in 5th century BC
Atomism proposes that everything is composed of an infinite variety of indestructible immutable ‘atoms’ that collide or link up to form clusters.
8Atoms are composed of smaller particles
Theory by: Joseph John Thompson in 1867
By demonstrating that cathode rays are composed of negatively charged particles, Thompson efficiently found the electron – the first of the subatomic particles to be discovered.
7Every event has a natural cause
Theory by: Thales c 580BC
Geek philosopher Thales attempted to explain natural phenomenon without reference to mythology. He was among the first to try to identify a substance from which all things are composed (water, he thought).
6Buoyant force equals displaced fluid weight
Theory by: Archimedes in c 250BC
Archimedes’ principle states that: ‘Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.
5Atoms of an element are identical in size and mass
Theory by: John Dalton in 1803
Our modern concept is based on a lecture in which Dalton proposed the matter is made of indestructible atoms, and that all elements of the same element are identical.
4Energy can’t be created or destroyed
Theory by: Julius von Mayer in 1842
German scientist Julius von Mayer established the law of the conservation of energy within a closed system (though it can be converted between different types – for example, between heat and kinetic).
3Objects move at a constant velocity unless acted on by external force
Theory by: Isaac Newton in 1687
Newton’s three laws of motion, including this third law, form the foundation of classical mechanics as we now understand it.
2Mass has an associated energy
Theory by: Albert Einstein in 1905
Arising from his theory of special relativity, Einstein’s most famous equation (e=mc^2: energy equals mass times speed of light squared) shows that the mass of an object is a measure of it’s energy.
1Hadrons are composed of quarks
Theory by: Murray Gell-Mann and George Zweig in 1964
Hadrons, subatomic particles including neutrons and protons that comprise atoms, are themselves composed of smaller particles called quarks.