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periode =
= = 2 s
frekuensi =
= = 0,5 Hz
cepat rambat gelombang =
= = 2m/s
periode = 1 bukit 1 lembah = 2s
cepat rambat = 2/2 =1m/s
frekuensi = 1/2 Hz
maaf kalo salah