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Sagot :
It looks like you're working on a school activity about locating the epicenter of an earthquake using the triangulation method. Here’s a more structured breakdown of your activity:
### Activity 1: Find the Center
**Objective:**
Locate the epicenter of an earthquake using the triangulation method.
**Materials Needed:**
- Hypothetical records of earthquake waves
- Philippine map
- Calculator
- Drawing compass
- Ruler
### Procedure:
1. **Study the Data:**
- Review the data showing the difference in the arrival time of P-waves and S-waves at the three seismic recording stations:
- **Batangas:**
Time difference = 8 seconds
Distance = 32 km
- **Puerto Princesa:**
Time difference = 3 seconds
Distance = 37.33 km
- **Davao:**
Time difference = 5 seconds
Distance = 26.67 km
2. **Compute the Distance of the Epicenter:**
Use the provided formulas to calculate the distances from each station:
- \( d = T_d \times 100 \, \text{km} \)
- Convert the distances into centimeters for drawing purposes (1 km = 100,000 cm).
3. **Set Up Your Compass:**
Choose one of the recording stations (e.g., Batangas) and set your compass to the computed distance in centimeters.
4. **Draw the Circle:**
Center your compass on the chosen station and draw a circle representing the distance to the epicenter.
5. **Repeat for Remaining Stations:**
Repeat steps 3 and 4 for Puerto Princesa and Davao. You should end up with three circles that intersect at a point.
6. **Identify the Epicenter:**
The point where the three circles intersect is the approximate location of the earthquake's epicenter.
### Note:
Make sure to label all your drawings clearly and double-check your calculations for accuracy. Good luck with your activity!
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