O-LevelPhysicsWaves5054/12 · Oct/Nov 2025 · Q51 Mark
A ship uses ultrasound to measure the depth of the sea. There is a time interval of 0.52 s between transmitting and detecting a pulse of ultrasound. The speed of ultrasound in sea water is 1500 m/s. What is the depth of the sea?
A390 m
B780 m
C1600 m
D5800 m
✓ Correct answer
A: 390 m
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