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Chemistry 20 Online
OpenStudy (anonymous):

i have some questions about science. will medal for good and quick explanations :) Describe, in your own words, how you found the epicenter of the earthquake. What would happen if we did not have three areas to compare? What if we only had one? What two types of waves are used to determine the epicenter of eartquakes? Which of the two types of waves arrives first? Why is it important to know the epicenter of an earthquake?

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