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BUNYI
• efek Doppler

v = 340 m/s
vs = 60 m/s, menjauhi P
vp = 10 m/s, mendekati S
fs = 800 Hz
fp = __?

fp = [(v + vp) / (v + vs)] • fs
fp = [(340+10) / (340+60)] × (800 Hz)
fp = 350/400 × (800 Hz)
fp = 700 Hz ← jwb