tolong dong plis pake cara.. makasih yaa

Gelombang Bunyi

16.]
Langsung saja , A = 15 cm
λ = 3 ÷ 2 = 1,5 m
T = 0,5 s
f = 1/T = 1/0,5 = 2 Hz

v = λ f
= 1,5 × 2 = 3 m/s

Jawaban : D

17.] https://brainly.co.id/tugas/13793659