Physicshard · Past Paper
Calculate the time taken by a sound wave of frequency 1000 Hz and wavelength 0.34 m to travel a distance of 680 m.
A1 second
B2 seconds
C0.5 seconds
D4 seconds
✓ Correct Answer: B — 2 seconds
Speed v = f * lambda = 1000 * 0.34 = 340 m/s. Time = Distance / Speed = 680 / 340 = 2 seconds.
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