Ultrasound from a fishing boat is used to find fish - Edexcel - GCSE Physics - Question 2 - 2013 - Paper 1
Question 2
Ultrasound from a fishing boat is used to find fish.
(a) (i) Which of these is correct for ultrasound waves?
Put a cross (X) in the box next to your answer.
A ult... show full transcript
Worked Solution & Example Answer:Ultrasound from a fishing boat is used to find fish - Edexcel - GCSE Physics - Question 2 - 2013 - Paper 1
Step 1
Which of these is correct for ultrasound waves?
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Answer
The correct answer is A: ultrasound waves have a frequency above 20 000 Hz. This is because ultrasound is defined as sound waves with frequencies exceeding the upper limit of human hearing, which is approximately 20 kHz.
Step 2
The system that uses ultrasound to find fish is called
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Answer
The correct answer is C: sonar. Sonar (Sound Navigation and Ranging) uses ultrasound to detect objects underwater, making it a suitable choice for finding fish.
