Question

The umber of vibrations completed in
Sound needs a
medium for propagation.
2.​

Answer 1

Hey mate ,

Required Answer :-

Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the components of pollution, can be either foreign substances

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Answer 2

Hlo !! here's Ur Answer ⬇️⬇️⬇️

The Propagation of sound. Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attentuated by the medium.

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