To determine how far the S wave travels in 13 minutes, we can refer to the information provided in the seismic graph for S waves.
From the description, we know that:
- The S wave begins at zero kilometers and zero minutes and increases to 10,000 kilometers at 25 minutes.
We can calculate the slope of the line representing S waves:
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The S wave travels 10,000 kilometers in 25 minutes.
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The speed of the S wave can be calculated as:
\[ \text{Speed of S wave} = \frac{10,000 \text{ km}}{25 \text{ minutes}} = 400 \text{ km/min} \]
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To find the distance traveled by the S wave in 13 minutes:
\[ \text{Distance} = \text{Speed} \times \text{Time} = 400 \text{ km/min} \times 13 \text{ min} = 5,200 \text{ km} \]
Since none of the options match exactly with 5,200 kilometers, we need to identify the closest option. Here are the given choices:
- 2,000 km
- 4,000 km
- 6,000 km
- 8,000 km
The closest option to 5,200 km is 6,000 km. Therefore, based on the options provided, the best answer is:
6,000 km