Physics MOC
Physics notes use maths to describe measurable structure: motion, fields, energy, matter, and units. This map links the main physics areas currently present in the vault.
Areas
- Mechanics MOC — motion, forces, Velocity, Momentum, Work, and Energy, now with Susskind bridges into Action, Lagrangian mechanics, and Hamiltonian mechanics.
- Electromagnetism MOC — charge, current, voltage, fields, circuits, and Lorentz force.
- Quantum Mechanics MOC — states, Hilbert space, observables, Schrödinger evolution, and Entanglement.
- Units MOC — SI units and dimensional checks.
- ASTRO MOC — astronomy, cosmology, and solar-physics notes.
- Susskind The Theoretical Minimum index — theoretical-minimum lecture notes and source trail.
Maths bridges
- Function and Domain define physical quantities as mappings from time, space, or state variables.
- Derivative turns position into Velocity and rates of change.
- Integral accumulates densities, work, charge, and probability.
- Vector Calculus index and Del operator ∇ are central for fields.
Parent: 00 Vault MOC.
Working style
When using physics notes, start by identifying the system, the quantities being measured, and the assumptions of the model. Then check the mathematical type of each quantity: scalar, vector, field, function of time, or function of space. This prevents common pitfalls such as differentiating with respect to the wrong variable or adding quantities with incompatible units.
Useful checks
Dimensional analysis is the fastest sanity check: both sides of an equation must have the same units. Boundary cases are the next check: ask what the formula predicts when time is zero, distance is large, mass is negligible, or a field vanishes.