balancingmist1827
02.05.2021 •
Physics
I bring a negatively charged rod near a metal sphere and "scare" the electrons in the metal sphere away into the ground via a wire. Charging an object by this method is called:
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Ответ:
The correct answer to the question is : B) The string vibrates the surrounding air, which produces a longitudinal wave.
EXPLANATION :
Before coming into any conclusion, first we have to understand sound wave.
A sound wave is a longitudinal wave in which the vibration of particles is parallel to the direction of wave propagation. It moves in a series of compression and rarefaction.
As it is a longitudinal wave, it needs a medium for its propagation. It can not propagate without any medium. The medium may be solid,liquid or air.
Hence, the correct answer of this question is that the string vibrates the surrounding air, which produces a longitudinal wave.