QQuestionEarth Science
QuestionEarth Science
Graph of P & S Wave Travel Times, showing Travel time in minutes across distance in kilometers for P and S waves. S wave starts at zero kilometers, zero minutes, and increases to 10,000 kilometers, 25 minutes. P wave starts at zero kilometers, zero minutes and increases to 10,000 kilometers, 13 minutes.
About how far does the S wave travel through Earth in 13 minutes?
A. 2,000 km
B. 4,000 km
C. 6,000 km
D. 8,000 km
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Answer
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Step 1:Determine S wave travel rate from graph
\text{S wave rate} = \frac{10{,}000}{25}
Divide total S wave distance by total time to get S wave speed in km per minute.
Step 2:Calculate distance S wave travels in 13 minutes
\text{Distance} = \frac{10{,}000}{25} \times 13
Multiply S wave speed by 13 minutes to get distance.
Step 3:Evaluate S wave rate
\frac{10{,}000}{25} = 400
S wave travels 400 km in one minute.
Step 4:Compute actual distance for 13 minutes
400 \times 13 = 5{,}200
S wave travels 5,200 km in 13 minutes.
Final Answer
5{,}200
S wave travels about 5,200 km in 13 minutes, so the closest answer is C. 6,000 km.
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