Which of the following statements best explains why striking a bell in a vacuum does NOT produce sound we can hear?
Sound needs a medium to travel from the bell to our ears
Sound is a mechanical wave and needs a material medium (solid, liquid or gas) to travel; a vacuum has no particles to carry the vibrations.
Hence, sound needs a medium to travel from the bell to our ears is correct.
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Which of the following is related to Doppler effect?
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