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. 

Leaning Tower of Pisa

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

Electrons, protons and neutrons in an atom

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

Solar energy into electric energy

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

Issac Newton

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

Albert Einstein

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

Hadrons are composed of even smaller particles

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.


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