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Описание: Waves & Sound In Physics, Railway Group D Physics Crash Course #9 | Group D Science, ध्वनि की परिभाषा, ध्वनि का उत्पादन, ध्वनि का संचरण, विभिन्न माध्यमों में ध्वनि की चाल, ध्वनि का परावर्तन, प्रतिध्वनि किसे कहते है, अनुरणन क्या होता है, श्रव्यता का परिसर, पराध्वनि के अनुप्रयोग, SONAR किसे कहते है, मानव कर्ण की संरचना, definition of sound, how sound is produced, how sound is propagated, properties of sound, characterstics of sound wave, speed of sound in different media, reflection of sound, define echo, what is reverberation, range of hearing, application of ultrasound, define SONAR, structure of human ear, group d physics, group d physics marathon, group d physics in hindi, group d physics rojgar with
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