Showing posts from January, 2022

ध्वनि (Sound) class 8th Science chapter-14 Ncert

ध्वनि (Sound) class 8th Science chapter-14 Ncert  1.सही उत्तर चुनीय- (i)आवृत्ति का मात्रक है- A.मीटर (m)  B.स…

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