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Statement of a problem № 41380

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The intensity of an earthquake wave passing through the Earth is measured to be 2.0 X 106 J/m2 s at a distance of 48 km from the source. (a) What was its intensity when it passed a point only 1.0km from the source? (b) At what rate did energy pass through an area of 5.0 m2 at 1.0km?




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