(a) A bird sings with an intensity inversely proportional to the distance from the bird. By how many decibels does the s

[answerhappygod]

A A Bird Sings With An Intensity Inversely Proportional To The Distance From The Bird By How Many Decibels Does The S 1 (47.82 KiB) Viewed 43 times

(a) A bird sings with an intensity inversely proportional to the distance from the bird. By how many decibels does the sound level drops when you move twice as far away from the bird? (b) A directional speaker emits sound waves of wavelength λ, perpendicular to a wall such that standing waves are formed. At what distance from the wall will you stand and hear no sound at all. Illustrate your answer with a sketch diagram. (c) A pearl collector would estimate the depth of the sea before he dives in to look for the pearls. Briefly describe an experiment he could perform to determine the depth.