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chapter 6
- Ch6-part1- transverse wave and longitudinal 15:35
- Ch6-part 2 -speed of sound wave formula 14:11
- Ch6-part3-speed of wave and examples 20:07
- ch6-part4 -echo-examples 15:38
- Ch6-part5-Doppler-Interference 25:41
- ch6-part6-review-sound waves and application 12:08
- Review card 07:37
- Question Black very important 07:09
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chapter 6
