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How far north should the site of the second explosion be?
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Answer to Problem 81RE
Explanation of Solution
Given information:
In a test of their recording devices, a team of seismologists positioned two of the devices
Calculation:
Given that the measured time difference for the first detonation is equal to that the second detonation, find the time difference of the first detonation.
Let
Since
So, the taken from the sound to reach
So, the measured time difference,
Since the time difference for the first detonation is equal to that of the second detonation, the time difference for the second detonation will also be
Using the difference, find the difference between the distance of
Substitute
Since the difference of the distance is
Since the foci are
We have
Replace
Hence the second detonation should be
Chapter 10 Solutions
Precalculus
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