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Chapter 3
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.. raw:: html

      <iframe width="560" height="315" src="https://www.youtube.com/embed/wQwnsP4Ij2c" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>


Lecture notes :download:`pdf <files/Phys343-C3.pdf>`