Q can hear the sound made by P in the shortest time, when the medium is a ___________.
A Brick wall
B Water
C Air
D Vacuum
where is Q and P, picture is missing
Ans 3:
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Ans 8:
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Aditya Sharma
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DPSN, NOIDA
Class : Class 3
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Ans 13:
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Ans 14:
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Class : Class 8
answer is B or C as from brick wall sound can't be heard also from vacuumsound can't be heard