The answer is either c or b
80/60=
1.3333...........................................
A. Physics
The study of how objects interact with each other
Answer:
normal force, the pluck will move off in a different direction
Explanation:
Answer:

Explanation:
Given that
At starting separated = 1.20m
And the increase in background noise by Δβ = 5 dB, due to which the level of sound also rises
Based on the above information, the separation rf that is needed is shown below:
As we know that

Hence, the separation r_f i.e. required is 
We simply applied the above equation so that the correct separation could come