Question

Please help me quick by answering these science questions.

Answer 1

Explanation:

Question 1:

It is better to use data from three or more seismic stations to find the epicenter of an earthquake because the intersection of three or more points gives a more accurate location of the epicenter.

• The method used in locating the position of an earthquake is simply by triangulating three or more points.
• Since we know the time of arrival and speed of earthquake waves, we use the distance at suitable scale to draw a circle at the seismic stations.
• The point of intersection of the circle gives the location of the epicenter of the earthquake waves.
• Using 1 or 2 locations will not result in an accurate position determination.
• A single circle from a seismograph station would only give us the region where earthquake must have likely occurred.
• Two circles will narrow down the odds of determining the position.
• Three or more circles gives perfect intersection which shows the position of the epicenter of the earthquake.

Question 2:

Properties of P-waves

• P-waves are known as primary waves.
• The have a velocity of about 5-8km/s
• They are always the first wave to arrive at a seismic station.
• They are propagated longitudinally i.e parallel to their source.
• They can pass through any earth materials be it solid liquids or gases.
• P-waves are body waves that moves within a body

Properties of S-waves.

• They are also known as secondary or shear waves.
• Their velocity is about 1-8km/s
• They are the second to arrive at a seismic station.
• They are propagated transversely to their source.
• They cannot pass through liquids and gases because they cannot be sheared.
• S-waves are body waves.

Question 3:

The conclusion that can be drawn from this is that the waves only pass through a solid material.

• P-waves are elastic seismic waves that can pass through any materials.
• They are always the first to arrive at a seismic station.

S-waves are secondary waves that will only pass through solid because they can shear.

Liquids and gases do not shear and will not allow s-waves to pass through them.

Since no s-waves are seen or recorded on the seismograph, we can infer that the material through which the waves cuts through is a solid alone.

Learn more:

Seismograph brainly.com/question/11292835

#learnwithBrainly