Lect22

# Lect22 - PHYS 172 Modern Mechanics Lecture 22 Counting...

This preview shows pages 1–9. Sign up to view the full content.

Fall 2011 PHYS 172: Modern Mechanics Lecture 22 – Counting Statistics Read 12.1–12.2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Announcements Exam 3 will be held on Wednesday, Nov. 16 , 8-9 pm in Elliott Hall. Material through chapters 8, 9, 10, and 11 will be covered. No lectures, labs, recitations, or homework the week of Thanksgiving . A practice exam 3 has been put in the Exams folder. HAPPY THANKSGIVING: No lectures, labs, recitations, or homework the week of Thanksgiving.
Reversibility Weird Al Yankovic, Amish Paradise

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Need For Statistical Considerations Today: Counting Statistics Entropy Einstein Model and Counting Microstates 2 nd Law of Thermodynamics Irreversibility Fundamental Assumption of Statistical Mechanics
5 Statistical issue: Thermal energy flow Happens all the time. Will this ever happen?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
6 A statistical model of solids Spring-ball model of solid
7 Einstein s model of solid (1907) Each atom in a solid is connected to immovable walls Energy: 2 2 2 2 2 2 1 1 1 0 0 0 2 2 2 2 2 2 y x z vib s s x s y s z p p p K U k s U k s U k s U m m m ! " ! " ! " + = + + + + + + + + # \$ # \$ # \$ # \$ % & % & % & 3D oscillator: can separate motion into x,y,z components Each component: energy is quantized in the same way

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern