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# Category: Physics

## The Theoretical Minimum to Study Classical Physics Updated 2021-01-28 Up to Exercise 5 page 28

## Quantum Mechanics in Pennsylvania Updated 2021-01-28 Problem 4.22.9 elements of the matrix added with Brute Force Up to Problem 4.22.10

## On Special relativity and Classical Field Theory The theoretical minimum Updated 2021-01-23, section 4.4.1 a note

## Quantum Mechanics and the Theoretical Minimum Updated 2021-01-21 Lecture 7.2 Section The projection Operators and the Space of States

## Quantum Mechanics in Texas, The Graduate Course Updated 2020-11-06 Section 1.13 Compatible observables and commutation

## Quantum Mechanics in Texas. The Undergraduate Course. Updated 2020-09-12 Sections 15.6-15.8

## Incompleteness, Uncertainty and Archimedes ‘Lever’. Update 2020-05-25, Section on Division of an angle in three equal parts removed and separated published on www.leennoordzij.me

## Puzzles with my grandchildren Updated 2020-04-27 Water-lilies growing in a pond

## Quantum Mechanics found in a nutshell. Work in progress. Updated 2020-04-05 Exercise 6.7 the matrix n=3

## Raindrops keep falling on my umbrella.