The sun has orbited along time so when they ask theses questions I give you the right answer I think lol
Answer:
option D
Explanation:
given,
Intensity of sound = 20 dB
distance = 15 m
intensity of sound is increased to = 50 dB
distance between the sound level = ?
Using relation

L₁ = 20 dB L₂ = 50 dB r₁ = 15 m r₂ = ?





r₂ = 0.47 m
r₂ = 47 cm
hence, the correct answer is option D
A
More concentrated means more collisions per unit volume, and as the volume stays the same and only concentration changes, the there are more collisions