Department of Physics
RUSMART pages (weather)
Spring 2015 Classes & Info
My daily schedule
NSF REU Program (list of REU sites)
The Nucleus (resources for
pics from the north pole trip
the picture from the trip
Simple 2-liter water rocket
American Institute of Physics
Homework #5: Due Friday, February 27, by 5:00pm
- section 3.4 (very short) contains the three general equations I wrote on the board. Eq. (3.14) is for a two-layer case, Eq. (3.33) is for a 3-layer case, and Eq. (3.39) is for the general case of 'n' layers. These are the ways to get the thicknesses of the various layers in the subsurface.
- Feel free to visit the Geometrics, Inc. site, the company from whom we purchased our SmartSeis seismometer. The SeisImager software that we're using is found by going "support"→"free software downloads and updates"→"seismographs" and getting the SeisImager/2D Installer - SeisImager_0214.msi file. Recall that you get 15 free uses in their evaluation mode.
- sectons 2.1.2-2.1.4. The equations that show the seismic velocities are in 2.1.4. As always, note that it's the properties of the material and not the waves that determines the seismic velocities.
- We didn't do much else since we had a snow day on Monday.
- Analyze this seismogram using Pickwin (a) to find a good set of parameters to display the information (amplitude, clipping/no clipping, etc.) (b) to pick the first arrivals using either the menu or the button, and (c) to print this out and turn it in with the first arrivals on it and the slope in green indicating the greater speed (take a screen shot since it won't print that green line, and since I need to see the speed at the bottom of the window).
- problem 2.3
- problem 2.4
- problem 2.5
- A 6.0-meter-high cylindrical marble column of radius 0.20m supports a stone roof with a mass of 55,000kg. Note: We got the marble from Maryland, not Vermont.
(a) By how much does the column compress due to the weight of this roof?
(b) This column also keeps the stone roof from moving to the right since the stone roof has a horizontal force of it of 32,000N. By how much does the top of the column move horizontally because of this force? Note: The shear modulus "S" is given by the textbook as G, defined in Eq. (2.9).
Hint: Useful information may be found in Table 2.1.
That's all for homework #5.