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If an earthquake has an intensity of 61000 times l_(0), what is the magnitude of the earthquake?

          If an earthquake has an intensity of 61000 times l_(0), what is the magnitude of the earthquake?
        

Added by Diane L.

University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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If an earthquake has an intensity of 61000 times l_(0), what is the magnitude of the earthquake?
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Transcript

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00:01 So in this problem, we're being asked to find the richter scale magnitude of an earthquake that has an intensity of i equal to 100 ,000 times i sub -zero.
00:12 Well, if you recall, we have a formula that allows us to find the richter scale magnitude.
00:18 It's m equals log of i divided by i -0, where i -0 is the measure of the intensity of a zero -level earthquake.
00:29 So to solve for this, all we're going to do is substitute this expression in place of i, which means that we'll have m equal to the log of 100 ,000 times i sub zero, all divided by i sub zero.
00:46 Well, those i sub zero levels are going to cancel out...
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