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Physics
Sound
CBSE
Class 9
Physics
Class 9 - Physics
Sound
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1.
While performing an experiment on verifying the laws of reflection of sound, the ‘reflected sound’ can be detected better by keeping one ear :
a.
near the end of the tube and keeping the other ear closed
b.
near the end of the tube and keeping the other ear open
c.
at about 5 cm from the end of the tube and keeping the other ear closed
d.
at about 5 cm from the end of the tube and keeping the other ear open
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