सोनार कैसे वस्तु की दूरी का अनुमान लगाने में मदद करता है?
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Answer: sonar ek device hai jo navigation k kaam ati hai. Isse frequencies chodi jaati hai aur un frequencies ko kisi cheez se takrakar wapas lautne me jitna wakt lagta hai, uss hisaab se us cheez ki doori na anumaan lagaya jaata hai.
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