Cheg 355 - Lecture Notes - Aug. 26, 2004
Announcements
- Review sessions will be held on Mondays in 320 Debartolo at 6PM. While these are
optional, it would be a good idea to attend if possible.
Class notes
Scanned Notes
The main points of the lecture were
- The Continuum Hypothesis
- Equations governing fluid at rest.
Goals:
After this class you should be able to:
- Solve simple hydrostatics problems.
Reading
- The class notes.
- BS&L, chapter 1
Additional Readings:
In class we talked about the speed of sound. While we won't be doing much
acoustics in this class, it's a fun topic. Check out the article
here
to see how gradients in the speed of sound (and the resulting refraction of sound waves)
have affected history!
Demonstration:
In class today we demonstrated how fluids can stratify according to density, and how that can be used to measure the density of solids. This approach is often used in mineral identification (obviously with much higher density fluids!), and density stratification itself is very common in nature. Gradients in salt concentration, for example, can impede (or promote) mixing in tidal estuaries, and density variations due to temperature or moisture content often determine cloud ceilings in the atmosphere. Internal waves often form at the interfaces between such layers - and can often be visualized by rippled cloud patterns where the peaks of the waves cause warm, moist air to project up into colder, drier air leading to condensation.
David.T.Leighton.1@nd.edu