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Résumé Resume - Physique-chimie
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cette fiche est un résumé du cours sur les ondes sonores vu en terminale spécialité physique chimie.
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caractéristiques ondes sonoresI. rappels première :
ondes mécaniques progressives : propagat° d’1 perturbat° mécanique
sans transport de matière mais avec transport d’énergie
2 typesd’ondes : transversales : longitudinales :
la “célérité” est utilisée pour désigner vitesse d’1 onde
formule :
ondes mécaniques périodiques : perturbat° se reproduit ds tps et espace :
double périodicité
périodicité ds tps : + petite durée au bout de laquelle perturbat° se répète en un
point donné au milieu du matériel
fréquence f : nb de répétit° de la perturbat°/sec :
périodicité ds espace : longueur d’onde + petite distance mesurée suivant direct°
de propagat°, sépare deux points du milieu ds le mm état vibratoire
célérité d’une onde périodique :
II. rappels seconde :
domaine de de fréquence :
sons :
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