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2025 · O/N · 5054/12 | Q5

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CIE-5054-2025-ON-p12 · Question 5

You may use a calculator. Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m/s²).
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5 A ship uses ultrasound to measure the depth of the sea. There is a time interval of 0.52s between transmitting and detecting a pulse of ultrasound. The speed of ultrasound in sea water is 1500m/s. What is the depth of the sea? A 390m B 780m C 1600m D 5800m

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5054/12/O/N/25Cambridge O Level Physics 5054 · Oct/Nov 2025 · Paper 1 variant 2 · Question 5