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On This Time-Travel Curve,if a Large Earthquake Is 400 Km

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On this time-travel curve,if a large earthquake is 400 km away from the station,what can you say about the arrivals of the P- and S-waves? On this time-travel curve,if a large earthquake is 400 km away from the station,what can you say about the arrivals of the P- and S-waves?   A) the P-waves will arrive 40 seconds before the S-waves B) the P-waves will arrive 400 seconds before the S-waves C) no S-waves will arrive at this distance from the earthquake D) none of these


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