PHY 2048
Unit 4

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Updated: 02/12/2017
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Week 10

Rest of the the tenth week:  Sections 13.1 through 13.3, oscillations.

I plan to demo the sinusoidal motion of a mass on a spring with the motion detector I used earlier in the semester. I may also visit a couple of sites before/during class to show some applications of this subject matter to simulations of molecular dynamics:

These are moderately big files (several Mb), so don't try this on a phone line!
I found these (and lots of others) by Googling "molecular dynamics animation". You can also see this technique used to model water waves in "Finding Nemo"; an explanation of how they used it can be found on Disc 2 of the DVD.


Week 11

Sections 13.3 through 13.5 to finish oscillations plus Sections 14.1 thru 14.7 on waves.

Week 12

Mon 4/3:  Finish Section 14.7, then do Section 14.8 on the Doppler Effect.

Tues 4/4:  Exam 3 will be given.

Rest of the twelfth week:  Sections 15.1 through 15.3 on fluid statics (hydraulics and buoyancy) and Section 15.4 on fluid dynamics (Bernoulli's equation).


Restructured treatment of thermodynamics:

I believe this topic makes more sense if we start with ideal gasses as described within the model known as statistical mechanics to put the emphasis on how internal (thermal) energy is related to temperature. Doing this before we deal with specific "heat" makes it clearer that different materials have different specific "heat" values because they have different internal energy formulas.

We will go through Chapters 16 and 17 as follows: Section 16.1 (temperature as measured by a gas thermometer) followed by Section 17.1 (ideal gas law) along with the relation between kinetic energy and temperature for an ideal gas on pg. 304 and the statistical mechanics picture on page 323 that this is all based on. We will then look at the specific heat of an ideal gas before taking up liquids and solids (Section 16.2), which are simply modeled based on data because the theory is much more complicated, and the latent heat (Section 17.2) required when materials change state -- because the internal energy changes without changing the temperature. Thermal expansion (Section 17.3) is in its usual place leading into Chapter 18.

Week 13

Mon 4/10:  Finish Bernoulli examples (Section 15.4) and start Thermodynamics (Section 16.1 on temperature).

Tues 4/11:  Sections 16.1 and 17.1, including pg 323-324 concerning the concepts of statistical mechanics and pg 304 concerning the idea of internal energy U, the thermal energy due to the sum of the kinetic energies of randomly moving molecules. The idea being emphasized is that what we generally refer to in common language as "heat" is the internal (thermal) energy of a system.

Wed 4/12:  Section 17.1, 18.3 (internal energy of an ideal gas and the specific "heat" required to change its internal energy), and Section 16.2 (specific heat of other materials). Here we use the First Law of Thermodynamics in the form DeltaU = Q.

Thurs 4/13:  Section 16.2 examples.

Fri 4/14:  Section 17.2 (latent "heat" of phase changes).


Week 14

Mon 4/17:  Finish examples from 17.2 plus Section 17.3 (thermal expansion).

Rest of the fourteenth week:  Start unit 5 Sections 18.1 and 18.2 and Sections 19.1 to 19.3.

Thurs 4/20:  Exam 4, which covers everything from Section 13.1 to 17.3, and possibly part of Section 18.1.

 
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 ?? Contact me if you have any questions.