Answer:
because these materials absorb the sound and do not allow them from going out of as, some times the sound can be a trouble to the people.
Explanation: Hope this helps!
Answer:
One positive and one negative
Answer:
The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies
The observable universe consists of galaxies and other matter that can, principally, be seen from Earth because the light signals have had time to reach us. Not everything in the sky is the way it is when we see it, because of the distance the light travels to reach us.
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