একটি অ্যামপ্লিফায়ার থেকে নিঃসৃত শব্দের ক্ষমতা 10 MW থেকে। 20 MW এ পরিবর্তিত হলে, শব্দের তীব্রতা লেভেলের কত ডেসিবেল পরিবর্তিত হবে?

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Admission Bangladesh University of Professionals (BUP) Faculty of Science And Technology(FST) 2019-2020 সবগুলো বিষয় একসাথে
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When she parted her parents, her eyes were full of tears.

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He can sing better than-in his family.

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