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11.02.2020 •
Mathematics
What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 46 kmkm from the source?
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Ответ:
The ratio of the intensities is roughly 6:1.
Step-by-step explanation:
The intensity I() of an earthquake wave is given by:
where P: is the power ans d: is the distance.
Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:
where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km
Therefore, the ratio of the intensities is roughly 6:1.
I hope it helps you!
Ответ: