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Verified answer
BUNYI• perambatan
f = 40 kHz = 40×10³ Hz
λ = 8,75 mm = 8,75×10⁻³ m
kecepatan rambat bunyi
v = λ f
v = 8,75×10⁻³ • 40×10⁻³
v = 350 m/s
Jika kelelawar diam
jarak kelelawar terhadap pohon (prinsip gema(
S = v t / 2
S = 350 • 0,4 / 2
S = 70 m ← jwb