Mohon bantu saya.....

BUNYI
• efek Doppler

v = 340 m/s
vp = ± 20 m/s
vs = ± 20 m/s
fp : fp' = ___?


frekuensi yang diterima pendengar
fp = [(v ± vp) / (v ± vs)] • fs

ketika saling mendekat
fp = [(340 + 20) / (340 - 20)] • fs
fp = (360) / (320] • fs
fp = (9/8) • fs

ketika saling menjauh
fp' = [(340 - 20) / (340 + 20)] • fs
fp' = (320) / (360] • fs
fp' = (8/9) • fs
perbandingan
fp : fp' = (9/8)•fs : (8/9)•fs
fp : fp' = (9/8) × (9/8)
fp : fp' = 81 : 64 ← jwb