f=n/t
f=2,5/0,5
f=5 Hz
panjang gelombang = 80/4 = 20 cm
cepat rambat gelombang = panjang gelombang x frekuensi
= 20 x 5 = 100
jawabannya C
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f=n/t
f=2,5/0,5
f=5 Hz
panjang gelombang = 80/4 = 20 cm
cepat rambat gelombang = panjang gelombang x frekuensi
= 20 x 5 = 100
jawabannya C