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3 gelombang = 3m
t = 2sekon
dit : v ?
a(lamda) = 3m:3 glmbng = 1
f = n/t = 3/2
v= a(lamda) . f
= 1 . 3/2
= 3/2
ket : f=frekuensi
a=lamda
. = kali