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শব্দের কম্পাঙ্ক বেড়ে যায় কখন ?

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in বিজ্ঞান by (-2 points)

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শব্দের কম্পাঙ্ক বেড়ে যায় তরঙ্গদৈর্ঘ্য কমে গেলে ।
by Earnings : 0.11 Usd (94 points)

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