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1 : . Les ondes m caniques progressives

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1 : . Les ondes m caniques progressives

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    1. ?????? ??? 1 : ??????? ??????????? ?????????. Les ondes mcaniques progressives ?? ??????? ??? ??? ????? ?? ???????( les ondes ) ???? ?????( onde sonore ) ? ????? ????? ( ondes de la mer)) ... ?????? ???????????.???? ?????????? ?? ????????????? ????????? ???? ??????: ?????? ??????????? ?? ?????? ???? ?? ????? ????? ?? ??? ???? ??? ?????? ?????? ?? ?????? ??????. ???? ?????? ?????. ???? ?????? ?????. ???? ?????? ?????. ???????: 1-?????? ??????????? ???????: Ondes longitudinale??? ???? ????? ??????? ??????? ?? ????? ?????? ??????. 2- ?????? ??????????? ????????? : Ondes transversale ??? ???? ????? ???? ??? ??? ???????? ?????? ??? ????? ????? ??????. ???? ?????? ???? ?? ??? ???? ??? ???? : Vitesse de propagation dune onde ?????? S( La source) ?? ???? ?????? ( ??????) ??? ?????? M ?? ?????? t ? ?????? M ?? ?????? t ????? ???? t: ????? : t=t-t ????? ?????? : V=MM/t-t

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