Crash Courses in Physics Topics?

AI Thread Summary
The discussion centers on the search for free online crash courses in various physics topics, specifically looking for PDFs that include good examples for effective learning. A recommendation is made for Benjamin Crowell's ebooks available at lightandmatter.com, which cover classical mechanics, quantum mechanics, and theories of relativity. However, there is a noted difficulty in finding resources specifically for quantum mechanics and Lagrangian mechanics. The request emphasizes the importance of examples in the learning process.
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Does anyone know of any "crash courses" in various physics topics such as classical mechanics, quantum mechanics, theories of relativity, field theories, etc free online? By "crash courses" I mean PDF's for example with good examples, since I learn the quickest with examples. I know it is rather specific but if anyone knows that would be great. I only ask if you are already familiar with some and would like to recommend them to me, I'm not asking anyone to google for me. Thanks.
 
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Thanks! I cannot seem to find quantum mechanics or lagrangian mechanics anywhere though?
 

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