An astronaut can not hear his companion's sound at the surface of moon because:
A
produced frequencies are above the audio frequency
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B
sound wave does not propagate through vaccum
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C
temperature is too low during night and high during day
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D
none of the above
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Solution
The correct option is B sound wave does not propagate through vaccum As there is no atmosphere on the surface of moon so sound wave cannot travel through vacuum as they are mechanical wave and need medium to travel that's why an astronaut cannot hear his companion's sound at the surface of moon.