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t = 3 s
f = 100 Hz
Dit : λ ?
Jwb :
Mencari v ( cepat rambat ) nya :
v = s / t
= 120 m / 3 s
= 40 m/s
masukan rumus mencari panjang gelombang :
λ = v / f
= 40 m/s / 100 Hz
= 0,4 m
maaf ya kalau salah