Physics, 27.10.2021 14:00 martymangaroo
trong mot thi nghiem giao thoa tren mat nuoc s1 s2 cung pha cung tan so f=15hz tai m cach a b lan luot la d1=23cm d2=26,2 cm
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trong mot thi nghiem giao thoa tren mat nuoc s1 s2 cung pha cung tan so f=15hz tai m cach a b lan lu...
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