General Science- Jab Dhwani Tarangein Chalti Hain , To Apne Sath Le Jati Hai ?

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Q.10456: जब ध्वनि तरंगें चलती हैं , तो अपने साथ ले जाती है ?
A.
B.
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D.
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जब ध्वनि तरंगें चलती हैं , तो अपने साथ ले जाती है ? General Science in hindi,   Dhwani question answers in hindi pdf  Urja questions in hindi, Know About Dravyamaan General Science online test General Science notes in hindi quiz book    Vibhavantar