Reading:

• all of chapter 2
• section 4.1

1. problem 2.1
2. problem 2.2
3. problem 2.3
4. problem 2.4
5. problem 2.7. Recall that sound in air moves at around 340m/s.
6. A P-wave travels straight down in a three-layer system. The upper layer has a wave speed of 1,700m/s while the second layer has a wave speed of 2,100m/s. The first layer is 32m thick while the second layer is 95m thick. Find the time that it takes the vibration to return to the surface from (a) the boundary between the first and second layers and (b) the boundary between the second and third layers.
7. The seismogram below shows the P wave and the two polarizations of the S wave from an earthquake. Assume this wave traveled through Arizona limestone. Find the distance to the epicenter of this quake. Note that the pairs P1/S1, P2S2, etc. are just various P- and S-waves from the quake. Earthquakes don't typically send out isolated, "clean" shakes.
   
8. problem 4.1. Recall that a t²--x² graph gives you what you need here.
9. problem 4.2