26.2.1. Nature and Motion

Try these first

1. 1.

   What motion do S-waves create in the ground?

   Hint

   Think about how much S stands for 'shear'.

2. 2.

   Can S-waves travel through liquids?

   Hint

   Recall that S-waves are not present in the Earth's outer core.

3. 3.

   What type of wave movement do S-waves cause?

   • Compressional
   • Transverse
   • Longitudinal

   Hint

   Relate S-waves to shear.

4. 4.

   True or False: S-waves can propagate through liquids.

   • True
   • False

   Hint

   Remember what we discussed about the Earth's outer core.

5. 5.

   Explain the implications of S-wave behavior on structural design in earthquake-prone areas.

   Hint

   Consider how buildings shake during an earthquake.

6. 6.

   Using the formula for shear wave velocity, calculate the velocity if the shear modulus is 80 GPa and density is 2000 kg/m^3.

   Hint

   Use your calculator carefully!