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d=12cm
r=6cm=0,06m
f=500Hz
SZUKANE:
T=?
V=?
WZÓR:
f=1/T
T=1/f
V=2πr/T
ROZWIĄZANIE:
T=1/500=0,002s
V=2*3,14*0,06/0,002=188,4m/s
Odp:Szukane wartości to 0,002s i 188,4m/s.