SOUND Class 9 || Complete CHAPTER IN ONE SHOT 🔥 || NCERT Covered || Alakh Pandey скачать в хорошем качестве

SOUND Class 9 || Complete CHAPTER IN ONE SHOT 🔥 || NCERT Covered || Alakh Pandey

Class Notes PDF - https://drive.google.com/file/d/1gX2m... Handwritten Notes - https://drive.google.com/file/d/14Cen... SOUND Class 9 || Complete CHAPTER IN ONE SHOT 🔥 || NCERT Covered || Alakh Pandey Timestamp 00:00 Introduction 01:10 What is Sound 05:54 How Sound Travels 08:51 How Sound Travels in a Medium 17:18 Waves 23:05 Longitudinal & Transverse Wave 31:32 Compression & Rrarefaction 44:10 Graph 48:32 Activity 11.4 49:57 Mechanical vs Electromagnetic Wave 52:49 Remember 54:22 Characteristics of a Sound Wave 55:12 Frequency 01:07:48 Time Period 01:14:45 Wavelength 01:17:37 Speed of Sound 01:24:09 Amplitude 01:27:10 Loudness of Sound depends on 01:32:01 Quality or Timbre 01:36:42 Speed of Sound 01:41:22 Reflection of Sound 01:44:30 ECHO 01:49:26 Important Questions 02:01:15 Reverberation - Multiple Reflection of Sound 02:03:27 Uses of Multiple Reflection of Sound 02:09:06 Range of Hearing 02:13:20 Infrasonic Sound 02:14:24 Ultrasonic Sound 02:22:15 Thank you #sound #class9 #oneshot #alakhsir #soundchapter