Concept explainers
Difference between the sound level of the explosion
Answer to Problem 10P
Solution:
The sound level explosion is 5 time greater for a person who is standing at a point directly below the explosion than for a person a horizontal distance of 200 m away
Explanation of Solution
Given:
Fireworks explodes, at 100 m above the earth surface
One person standing right below the explosion
Other person is standing at a horizontal distance of 200 m
Formula used:
The loudness or intensity of the sound is inversely proportional to the square of the distance
Here,
is the distance from the sound source
Calculation:
Calculate the distance of 200 m person from the sound source by using Pythagoras theorem
Now the intensity of sound at the person standing right below the explosion is calculated as
…… (1)
Now the intensity of sound at the person standing 223.6 m away from the explosion is calculated as
…… (2)
Divide the Eq. (1)by Eq. (2)
Hence, the sound intensity is 5 times greater.:
Chapter 12 Solutions
Physics: Principles with Applications
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