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Physics, 27.02.2021 16:00 tjkma1234

قدر کیف ستختلف شدة الصوت عندما تتحرك مسافة 12 متر بعيدا عن مكبر صوت يبعد 4 مترقبل تحركك ؟

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قدر کیف ستختلف شدة الصوت عندما تتحرك مسافة 12 متر بعيدا عن مكبر صوت يبعد 4 مترقبل تحركك ؟...
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