Tuesday, April 26, 2011


Monday, April 25th

Period 2, 3, 6, 7 - Sound lecture with demonstrations - lecture notes posted here: https://sites.google.com/site/dandradeedusite/Home/physics-class-files

Homework - Packet 12 - Sound - #1-12 - copy is available here: https://sites.google.com/site/dandradeedusite/Home/physics-class-files

Tuesday, April 26th

Period 2 - sound videos

Period 5 - Sound lecture with demonstrations (lecture notes and packet: https://sites.google.com/site/dandradeedusite/Home/physics-class-files)
Homework - Packet 12 #1-12

Period 7 - go over homework, videos

Wednesday, April 27th 

Period 2 - go over homework
Period 3 - go over homework, video

(early dismissal - Parent conferences 12:30 - 3pm)

Thursday, April 28th

Period 3 - lab
Period 5 - go over homework, lab

(early dismissal - Parent conferences 4:30pm- 7pm)

Friday, April 29th

Periods 2, 3, 6, 7 - special demonstration of sound, waves, and electromagnetism

Wednesday, April 13, 2011

Waves on a String

Waves on a String

(tip - copy this into your Word document and the just delete the parts you don't need. Then you will have the questions already in your document).

(Drawings and sketches can be done on paper or in Word using the drawing feature.)

Learning Goals: Students will be able to discuss waves’ properties using common vocabulary
and they will be able to predict the behavior of waves through varying medium and at reflective

Directions:   http://phet.colorado.edu/en/simulation/wave-on-a-string

1. Open Waves on a String, investigate wave behavior using the simulation for a few minutes. As you
look at the waves’ behavior, talk about some reasons the waves might act the way they do.

2. Write a list of characteristics that you will use in this activity to describe the waves. Describe each
characteristic in words that any person could understand. Leave some writing space for characteristics
that you might think of later during the activity.

3. With the Oscillate button on and with No End checked, investigate waves more carefully using the
Amplitude slider. Write answers to the following after your group has talked about each and agreed.
a) Define Amplitude in everyday language.
b) Explain how the wave behaves as the Amplitude changes using the characteristics you described
in #2
c) Use a rope on the floor for some investigations and explain how you could change the
Amplitude of a wave.

4. Repeat step number 3, for Frequency, Tension and Damping.

5. Set Amplitude on high, Frequency, Damping and Tension on low. Also, have on Oscillate, Timer and
No End. Use the Pause button to freeze the wave.
a) Place a blank piece of paper on your monitor and trace the wave and the wave generator.
Mark the green balls. This is a vertical position- horizontal position graph, label your axes.
b) Quickly press Play, and then Pause again. Use the same piece of paper, put it on the monitor
and make sure to get the generator in the same spot. Trace the new wave.
c) Write about the differences and similarities in the characteristics. You may have to do some
more tests by pressing Play, then Pause and tracing to test your ideas.
d) Try some other settings and talk about why I recommended the settings that I did.

6. Set Amplitude on high, Frequency, Damping and Tension on low. Also, have on Oscillate, Timer and
No End. Use the Pause button to freeze the wave.
a) Measure the vertical location of a green ball with a ruler.
B) Record the vertical position and time.
b) Quickly press Play, then Pause repeatedly to make a data table the vertical position of the
green ball versus time.
c) Make a graph of vertical position versus time.
d) Write about the differences and similarities between vertical position- horizontal position
graphs and vertical position-time graphs.

7. Investigate how waves behave when the string end is Fixed and Loose with Manual settings. Discuss
the behavior with your partners. Test your ideas and the write a summary.

Summit all work as a WORD File to dandrade@bridgeportedu.net

Monday, April 11, 2011

Week of 4-11 to 4-15 2011 Schedule

This week we are working on Vibrations and Waves.

Lecture notes are here: https://sites.google.com/site/dandradeedusite/Home/physics-class-files
(Physics - Vibrations and Waves lecture notes.pdf)

Packet #11 - Simple Harmonic Motion is posted here in case you misplace yours:
Physics - Packet 11 - Simple Harmonic Motion.pdf)

We will be doing the lecture, homework, and a lab investigation this week. 

Wednesday, April 6, 2011

Schedule and homework for rest of week

Heat Lecture notes are posted here:
"Physics - Heat lecture.pdf"

Heat homework packet (#10) is also posted there.
"Physics - Packet 10 - Temp and Heat.pdf"

Wednesday, April 6th 2011

Period 2 - Heat lecture. Homework is ALL of Packet 10 (Temperature and Heat) #1-15

Period 3 - finish Labs (buoyancy)

Period 6 - Heat lecture. Homework is ALL of Packet 10 (Temperature and Heat) #1-15

Thursday, April 7th, 2011

Period 3 - Heat lecture. Homework is ALL of Packet 10 (Temperature and Heat) #1-15

Period 5 - Heat lecture. Homework is ALL of Packet 10 (Temperature and Heat) #1-15

Period 7 - go over Heat homework (packet 10, #1-15)

Friday, April 8th, 2011

Period 2 - go over Heat homework (packet 10, #1-15)

Period 3 - go over Heat homework (packet 10, #1-15)

Period 6 - go over Heat homework (packet 10, #1-15)

Period 7 - Vibrations and waves lecture

Friday, April 1, 2011

Bridge project results

Here are the results of the bridge project:

Winners by Class Period:  (order overall listed next to it )

Per 2 - Tatiana, Tayjhanae, Samantha, Ashli, Christina - 19,500 grams   (1st overall)
Per 3 - Richard, Nick G., Meng - 18,800 grams    (2nd overall)
Per 5 - Derrick, Doug, Eric, Stephanie, Diana - 14,400 grams    (4th overall)
Per 6 - Duy, Kajin, Joey, Mary, Steven - 18,000 grams   (3rd overall)
Per 7 - Iury, Francisco, Markeith - 7200 grams  (5th overall)

Winners based on mass ration (mass of bridge divided by mass held) (smallest # is best)

1st place - from Period 6 - Duy, Kajin, Joey, Mary, Steven  1.17 x 103
2nd place - from Period 2 - Miguel, Phuong, Dafir, Dennis, Rachel  1.28 x 103
3rd place - from Period 3 - Richard, Nick G, Meng  1.33 x 103

Congratulations to everyone. You guys did a great job on this project.

Here are some of the pictures of the bridges and them being tested: (I'll be posting more of them later)