Explanation :
Absorption coefficient of a material determines how much sound is absorbed by the material.
To build a soundproof room, Heavy curtains and carpet can be used. They reduce reverberation.
Reverberation means an echoing sound which persists for some time. For example, when we bang on a huge piece of metal, we hear the reverberation even after we stop banging.
Hence, option (A) and (D) are correct.
I think it's D because sunlight is a solar system
Answer:
borosilicate glass
Explanation:
headlamp glass is a borosilicate glass by gravity feed
Answer:
First statement:
Energy can neither be created nor destroyed.
Second statement:
Energy can be converted from one form to another.
Explanation:
According to the law of conservation of energy:energy can neither be created nor destroyed but can be converted from one form to another
