October 2018 1 23 Report

zadanie 1

Największa częstotliwość dźwięków wydawanych przez delfiny wynosi O,1 kHz. Oblicz długość fali dźwiękowej wysyłanej przez delfiny w wodzie morskiej, gdzie średnia prędkość dźwięku wynosi 1500 m/s. Oblicz długość fali dźwiękowej wysyłanej przez delfiny w powietrzu,gdzie średnia prędkość dźwięku wynosi 330 m/s. Określ różnicę czasów potrzebną na pokonanie tej fali w powietrzu i w wodzie na drodze 2 km.

zadanie2

Faza początkowa w pewnym ruchu drgającym wynosi 0, amplituda A, a okres 4s. Po jakim czasie, po raz pierwszy, wychylenie wyniesie połowę amplitudy?

Bardzo proszę o pomoc dam naj :)

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Napisz po 3 pytania do każdej sceny z "DZIADÓW cz.III"Bardzo proszę o szybką odpowiedź :)
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