O-LevelPhysicsWavesOct/Nov 2025Paper 1 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
The correct answer is A. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep