Static Charge SIMULATORS

LINK TO JOHN TRAVOLTAGE (pHet)

LINK TO ONLINE SIMULATIONS OF STATIC CHARGE (pHet)

HW: Due Thursday 5/4
1) fiddle around with online static electricity simulators-
think about what is moving where and why.
What objects allow for the build up of charge? Which don't?

2)  See this blog entry.  Please do NOT do questions below.
 due Monday, 5/8
from the text book: READ pages:   628-633
PRACTICE PROBLEMS  pages 654-655, #1, 2, 3, 17 AND 18.
(You might have to review the meaning of atomic #s to be able to do one of these problems.  It is expected that you review this information independently to do this problem).

Triboelectric Series

Answers to Review questions for 5/1 test

Waves... review 2

Textbook photocopy
Chapter 13:
page 493, #3
page 499: #2
page 503 #2
reading: pages 504-505
page 507; #13, 14 & 15

Chapter 14:
page 523: #2
page 548: #4

Chapter 15:
page 567: Practice 5A 1-3, and review 1-3
page 585: #1
page 587: #16

DUE Monday, 5/1
QUIZ CLOSED NOTES OVER THE SAME QUESTIONS
QUIZ WILL FOCUS (ha!) ON OPTICS more than SOUND.... b/c we've already had a quiz on sound.... so... big big big hint.... quiz will put emphasis on Chapters 14 & 15...

POLARIZATION reading

READING: Polarization

Snell's Law Lab

Snell's Law Lab
Big hints:
1) easiest to calculate sine of angles in a calculator, then create your data tables in excel
2) n = sin theta i/ sin theta r... x-axis is to be the denominator & y-axis the numerator in that equation.... see in class notes for more detail.

Wave Application Presentations

WAVE application presentations: explanation

Wave interference pHet

PHET demos
this requires java.
and won't work on some Macs or Chromebooks
it is safe to download.

https://phet.colorado.edu/en/simulation/wave-interference

a few examples of instruments... just in case

Speed of Sound LAB

U.S. Navy F/A-18 approaching the sound barrier. The white halo is formed by condensed water droplets which result from the shockwave shedding from the aircraft (see Prandtl-Glauert Singularity).^[1][2]

Using sound tubes to measure the speed of sound in air

Use a sound tube-water-tuning fork system to measure the speed of sound in air.  For best results you should do trials for at least 4 different tuning fork frequencies, and use a graph of these data to generate a value for the speed of sound in air. In your write up you should include a schematic of how a standing wave resonates in a sound tube for the fundamental frequency.  In addition, please include your data table of measurements, and extensively show your calculations for the speed of sound in air.  You should be able to include this on one page.  

IB Assessment: Data Collection and Processing, Conclusion and Evaluation

HW for Friday, 4/7

HW problems: from the text book, due 4/7 Friday!
page 508 #31, 40, 41, 42, 43, 44

you should also be familiar with
previous HW handout [adapted from pages 470 # 27, 37, 39, 40, 42, and 48 in the Text].
There will be a quiz Friday.