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Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Question 2
Complete the sentence by putting a cross (X) in the box next to your answer. Earthquakes can produce infrasound waves. Compared to normal sound waves, infrasound wa... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
Infrasound waves are sound waves with frequencies below the lower limit of human hearing (typically below 20 Hz). Compared to normal sound waves, which we can hear and generally have higher frequencies, infrasound waves always have a smaller frequency. Therefore, the correct answer is C frequency.