1 golombang 1 bukit 1 lembah jadi ada 2,5 gelombang
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B. P = 20s / 1 gelombang = 20 s
C. F = 1 gelombang / 20 s = 1/20 Hz
D. P.Gelombang (lamda)
2½ = 100m
Lamda = 100 : 2½ = 25m
E. V = Lamda . F
V = 25. 1/20 = 5/4
F. A = 4 cm
SORI KALO SALAH :)
1 golombang 1 bukit 1 lembah jadi ada 2,5 gelombang