Sawaal
11
Q:

Sound becomes hazardous noise pollution at decibels?

A) above 120 db B) above 80 db
C) above 50 db D) above 30 db

Answer:   A) above 120 db



Explanation:

Sound intensity is measured in decibels(db). Sound pollution above 120 db becomes more hazardous and have adverse affects on human life. 

Subject: Physics
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