Tuesday, February 28, 2012

Electric Current, Chp 18

Chapter 18, Electric Current

Lecture notes:
"AP Physics - Chp 18 - Electric Current.pdf"

Homework:  Chp 18 Problems: # 5, 7, 11, 13, 27, 33, 43
Due Thursday, 3/1

We will go over the homework and then do Chp 19, DC Currents on Thursday.

We will be doing labs after Chapter 19.

There will be a quiz on Chapters 16-19 also (sometime next week)

Monday, February 27, 2012

Electric Potential

Today, Monday, February 27th, we did "Electric Potential" which is Chapter 17 in your book.

Lecture notes are here:
"AP Physics - Chp 17 - Electric Potential.pdf"
Homework is Chapter 17, Problems 3, 5, 15, 21, 35, 37, 43, 47

Tomorrow, Tuesday, February 28th, we will go over the homework and then do the Chapter 18 lecture "Electric Current"

(so start reading Chapter 18)

We will be doing labs after chapter 19.

Wednesday, February 15, 2012

Electric Charge and Electric Field

Today we finished Chapter 16, Electric Charge and Electric Field.. Homework is Chp 16 Problems: # 5, 7, 9, 23, 25, 27, 31.
We started the first lab today too.

Lecture notes are posted:
"AP Physics - Chp 16 - Electric Charge - Electric Field - 2012.pdf "

Here are two videos on the topic:

On Friday we will go over the homework and then continue the lab.

Over break, don't forget to do the practice test problems. After break, we will go over them and then finish the labs for this chapter and then continue onto chapter 17. It wouldn't be a bad idea to read chapter 17 over the break either.

See you Friday!

Great job today too!

Saturday, February 11, 2012

Answers and hints to self check your work on Fluids/Thermo assessment.

AP Physics       ASSESSMENT    Fluids/Thermo   

Answers/hints to self-check 

1. (C) 8° C

2. (B) 4,800 J/s

3. (A) 40%

4. (A)   Area under curve is greatest.

5.(A)     pV is greatest, and this is proportional to T.

Free Response


a) use T = ρV/ R and plug in for each one

b) use Q = ΔU - W

c) 2ρV0

d) use ΔU = Q = 3/2 nRT

e)i) use ΔU = Q = 3/2 nRT

e)ii) ΔU = 0

a) p = atmospheric pressure plus pressure due to weight on top of piston

b) use V = nRT / P

c) i) pressure stays the same

c) ii) H/T = H’/T’

d) use ΔU = Q = 3/2 nRT

Thursday, February 9, 2012

Thermodynamics Virtual Labs and Investigations

Thermodynamics Virtual Labs and Investigations 

All students must turn in their own paper.

Lab 1:

–Change volume, E, and molecules and observe what happens
Write observations, calculations, answers to questions down. What did you see? Was this what you expected? How do the laws of thermodynamics apply? Etc. 

Lab 2:

Run simulation, change variables and observe what happens.  Write observations, calculations, answers to questions down. What did you see? Was this what you expected? How do the laws of thermodynamics apply? Etc. 

Notice that you can adjust the height of each side of the reaction.

What do you think the ruler in the middle represents?

Move the middle bar to 50.

Move the reactant energy platform to 25. Keep the products on the lowest
possible setting.

Would you expect this reaction to be endo or exothermic? Why?

Add 50 particles to A.

Press start. Record what happens.

Attempt changes to the reaction conditions that will increase the amount of
product.(Record what you did and the results)
a) First change


b) Second change

Which change you made above would best simulate the addition of a catalyst to a
chemical reaction.
Now move the products to 25 and place the reactants at the lowest possible
setting. Start over with a new 50 particles. Record what happens. Would you
expect this to be more or less spontaneous? Why?

Lab 3:
–Read directions and do all 7 experiments

Write observations, calculations, answers to questions down. What did you see? Was this what you expected? How do the laws of thermodynamics apply? Etc.

Tuesday, February 7, 2012

Chapter 15 is done

Today we did the presentations on the Laws of Thermodynamics - great job everyone!

We then did a summary of Chapter 15 and your homework is Chapter 15, Problems 51, 53, 55

On Thursday, we will go over the homework and then do some labs.

Wednesday, February 1, 2012

Some more resources for you

This site, which I write, http://educationaltechnologyguy.blogspot.com/ has information on things like Prezi, Glogster and screen recording apps to help you create your presentation. There is a search box on the right side down a bit.

Also, I posted the lecture notes for Chp 15 so you can read those over if you want.

Be creative. Be unique. Have fun.

Laws of Thermodynamics Assignment

Research the 3 Laws of Thermodynamics (actually 4) and prepare a short presentation explaining them.

You can use any resources and create the presentation in any format you choose (PowerPoint, website, electronic poster).  Try out Prezi, Glogster too.

Be specific and explain the concepts fully, but the presentation should not take more than 10 minutes to give.

Here are some videos you can use to help you out: