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v = 4 m/s
jarak 4 bukit = L = 32 m
Ditanyakan : Panjang gelombang dan f ?
Dijawab :
4 bukit = 3 gelombang
Panjang gelombang :
λ = L/3
= 32/3
= 10,67 m
Frekuensi :
f = v/λ
= 4 / 10,67
= 0,37 Hz