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SAI INTERNATIONAL SCHOOL
                                                          Class8
                                                     Lesson Notes
                                                   Subject-Physics
                                                       CH-Sound
                                         Subtopic- Propagation of sound

               NOTES


               Propagation of sound
                          1.  Sound needs a medium to propagate (eg: air, liquid, solid).
                          2.  Sound propagates as longitudinal wave in air.
                          3.  Speed of sound depends on
                                 a.  density of medium: as density increases speed increases
                                 b.  Humidity of air: as humidity increase speed increases
                                 c.  Temperature of air : as temperature increases speed increases.
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