Fenomen fizic datorita caruia se produc sunetele:, vibratia, surse sonore, ecoul, In ce se masoara intensitatea sunetului?, HZ, decibeli, secunda, Ce marimi fizice caracterizeaza vibratia?, perioada si frecventa, viteza, timpul, Sunete percepute de urechea umana sunt produse de:, vibratie, ecou, surse sonore, Ce medii permit propagarea sunetului:, gazoase,lichide,solide, vid, vid si lichide, Simbolul pentru decibeli este:, bd, DB, dB, Vibratia este periodica?, adevarat, fals, Exemple de surse sonore:, ecoul, corzi vocale,instrumente muzicale, aparate electrice.
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Sunetul
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Alexandrabianca6
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Sunet și proprietățile undelor sonore
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