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Q. 68

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 453

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Short Answer

The sound intensity 50 m from a wailing tornado siren is

.

a. What is the intensity at 1000 m?

b. The weakest intensity likely to be heard over background noise is . Estimate the maximum distance at

which the siren can be heard.

a. Intensity of sound is,

b. The maximum distance is , from which the siren can be heard.

See the step by step solution

Step by Step Solution

Part a Step 1: Given data

At a distance , intensity of sound is

At a distance ,the intensity of sound should be found.

Step 2: Determination of intensity

The intensity can be obtained as,

Part b Step 1: Given data

The weakest intensity likely to be heard over background

noise is .

The maximum distance should be obtained from which the siren can be heard.

Step 4: Determination of the maximum distance

The maximum distance can be obtained by,

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