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Dik : n = 1,5 gelombang
λ = 15 m
t = 0,5 s
a) f =
=
= 3 hz
b) λ = 15 m
λ = . 15 m
λ = 10 m
c) v = λ.f
v = 10 m x 3 hz
v = 10 m/sekon
NOMOR. 2
Dik: λ = 10 m
T = 4 s
a) λ = 10 m
λ = 2 x 10 m
λ = 20 m
b) v = λ / T
v =
v = 5 m/sekon