Two boys are communicating with each other by stretching ...
Two boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels
mainly through air
fainter in stretched string
faster through gases than in solids and liquids
with greater ease through a string than in air
none of the above is correct
Correct answer is D
No explanation has been provided for this answer.
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