SV
StudyVirus
Get our free app!Download Free

Physics Basics

Physics · भौतिकी की मूल बातें · 13 facts

1

Physics: study of nature and natural phenomena; from Greek 'Physis' meaning nature

2

Physics is called the Father of all Sciences

3

7 fundamental quantities: length, mass, time, temperature, current, amount of substance, luminous intensity

4

Scalar quantity has only magnitude (speed, mass, distance); Vector has magnitude + direction (velocity, force)

5

Distance is scalar; Displacement is vector — same concept, different type

6

Speed is scalar; Velocity is vector (speed with direction)

7

Main branches: Mechanics, Optics, Thermodynamics, Electromagnetism, Nuclear Physics

8

Galileo Galilei: Father of Modern Physics and Observational Astronomy

9

Isaac Newton: Father of Classical Mechanics; gave 3 Laws of Motion and Law of Gravitation

10

Albert Einstein: Theory of Relativity (1905); E = mc² — mass-energy equivalence

11

Derived quantities are formed from fundamental quantities — e.g. Force = mass × acceleration

12

Dimensional analysis checks correctness of physical equations using [M], [L], [T]

13

Accuracy = closeness to true value; Precision = consistency of repeated measurements