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Why we have to measure compression wave and shear wave?

Updated: 8/16/2019
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Q: Why we have to measure compression wave and shear wave?
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What is the measure from one compression to the next compression of a longitudinal wave?

Speed.


How do you measure the compression of a longitudinal wave?

It is the distance between two points of maximum compression (or minimum compression).


What is a shear wave?

a shear wave is a wave that moves perpendicular throuth the earth in the form of an earthquake


Are shear waves and seismic waves the same?

A shear wave is a type of seismic wave.


Why are s waves called s waves?

A little background first. When an earthquake wave arrives at a seismograph station, the first wave to hit is called the P wave. The second is called the S wave. It turns out that the P wave is a compression wave and the S wave is a shear wave. A compression wave is a direct shove (or tug) parallel to the direction the wave is traveling. A shear wave is a side-to-side shake at right angles to the direction the wave is traveling; transverse to the travel direction, in other words. Therefore the S wave is also known as a transverse wave. The letters P and S actually come from the Latin for First and Second, "primus" and 'secundus." The English "primary" and "secondary" doesn't quite have the same meaning, but it will help you remember which arrives when. "Push" and "Shear" or "Shake" will help you remember which kind of wave has which kind of motion. The time between the P and S wave occurs because the compression wave travels through the Earth faster than the shear wave does. Since the shear wave is slower, the further you are from the epicenter of the earthquake the longer the time between the P and S waves. Seismologists use this to determine how far the epicenter was from the seismograph. And by using distances from three or more seismometer stations at once, they can find the earthquake's epicenter. Another neat thing about the P and S waves is that a compression wave will go through a fluid like water or air, while a shear wave won't. Because S waves won't go through the outer layers of the Earth's core, we know that those layers are liquid.


What makes a compression wave?

compression wave is a wave like a sound wave


Why are P waves called push-pull waves?

A little background first. When an earthquake wave arrives at a seismograph station, the first wave to hit is called the P wave. The second is called the S wave. It turns out that the P wave is a compression wave and the S wave is a shear wave. A compression wave is a direct shove (or tug) parallel to the direction the wave is traveling. A shear wave is a side-to-side shake at right angles to the direction the wave is traveling; transverse to the travel direction, in other words. Therefore the S wave is also known as a transverse wave. The letters P and S actually come from the Latin for First and Second, "primus" and 'secundus." The English "primary" and "secondary" doesn't quite have the same meaning, but it will help you remember which arrives when. "Push" and "Shear" or "Shake" will help you remember which kind of wave has which kind of motion. The time between the P and S wave occurs because the compression wave travels through the Earth faster than the shear wave does. Since the shear wave is slower, the further you are from the epicenter of the earthquake the longer the time between the P and S waves. Seismologists use this to determine how far the epicenter was from the seismograph. And by using distances from three or more seismometer stations at once, they can find the earthquake's epicenter. Another neat thing about the P and S waves is that a compression wave will go through a fluid like water or air, while a shear wave won't. Because S waves won't go through the outer layers of the Earth's core, we know that those layers are liquid.


What are some types of stress in rocks?

The three main types of stress in a rock are shearing, tension, and compression.


Three types of stress that occurs in Earth's crust?

Tension, Compresion, and Shear :)


What is compression and a rarefaction in a longitudinal wave?

When you have the complete compression and rarefaction of a longitudinal wave, that is one complete wave.


Which direction is the particle motion in shear waves relative to the energy of the wave?

The particle motion in shear waves relative to the energy of the wave is downward.


What is sound of wave?

A compression wave.