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Introduction to General Physics
11-02-08
What is Physics?
A branch of natural science dealing with the behavior and composition
of matter and its interactions at the most fundamental level.
Classical Physics：
Classical Mechanics, Thermodynamics, Electromagnetism (Electromagnetic Waves, Optics).
Mordern Physics：
Special Relativity, Quantum Mechanics, General Relativity...
The Basic Interactions
| Interaction | Relative Strength | Range |
| Strong | 1 | 10-15 m |
| Electromagnetic | 10-2 | Infinite |
| Weak | 10-6 | 10-17 m |
| Gravitational | 10-38 | Infinite |
•Electroweak Interactions Attemps to combine the strong and electroweak interactions
→ Grand Unified Theory
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