Question
What is the ratio of ($a$) the intensities, and ($b$) the amplitudes, of an earthquake P wave passing through the Earth and detected at two points 15 km and 45 km from the source?
Step 1
This can be written as $I \propto \frac{1}{d^2}$, where $I$ is the intensity and $d$ is the distance. Show more…
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(II) What is the ratio of $(a)$ the intensities, and $(b)$ the amplitudes, of an earthquake P wave passing through the Earth and detected at two points $15 \mathrm{~km}$ and $45 \mathrm{~km}$ from the source.
What is the ratio of the intensities of an earthquake P wave passing through the Earth and detected at two points 14 km and 41 km from the source? And what is the ratio of the amplitudes?
(II) What is the ratio of $(a)$ the intensities, and $(b)$ the ampli- tudes, of an earthquake $P$ wave passing through the Earth and detected at two points 15 $\mathrm{km}$ and 45 $\mathrm{km}$ from the source?
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