September 17, 2007

Hello, my name is Kimberley and I am today's scribe.

Today in class we went over the answers to questions 6 - 14 in the green booklet. If you missed any of the answers, they have all been posted on the blog by Mrs. Kozoriz. For the remainder of the class we worked on a worksheet having to do with Superposition, which you can hand in tomorrow if you haven't already handed it in today.

REMINDER: Tomorrow we have a test on Waves in One Dimension. I would suggest looking over everything in the green booklet. Good luck and don't forget to study.

That is pretty much everything we did today. The scribe for tomorrow is Jennifer.

Problems 6 - 14

Hi everyone! I'm Christine and I will be your scribe for today.

In todays class, we worked on CHAPTER 14: STUDY GUIDE worksheet that was handed out by the substitute teacher. And we also corrected them in the end of the class. Here are the answers for the people who didn't get all the answers.

14.1 Wave Properties

Types of Waves

1. mechanical
   
2. material
   
3. electromagnetic
   
4. no


5. particles


6. matter


7. three


8. perpendicular


9. motion


10. parallel


11. motion


12. surface


13. parallel


14. perpendicular


15. single


16. continous


17. vibrating


18. harmonic

The Measures of a Wave: Frequency, Wavelength, and Velocity

1. shortest
   
2. motion


3. vibration


4. second


5. hertz


6. Hz


7. f= 1/T


8. T


9. f


10. wavelength


11. lambda


12. high


13. low


14. v=lambda(frequency)
    

Amplitude of a Wave

1. maximum


2. equillibrium


3. more


4. energy
   

14.2 Wave Interference

Waves at Boundaries Between Media

1. amplitude


2. frequency


3. properties


4. the same as


5. equal to


6. incident


7. transmitted


8. energy


9. reflected


10. most


11. little
    
12. inverted


13. errect?


14. frequency


15. wavelength


16. speed
    

Superposition of Waves

1. independently


2. displacement


3. sum


4. displacement


5. superposition


6. the same


7. greater


8. shape


9. size


10. opposite


11. zero


12. destructive interference
    

Standing Waves

1. undisturb


2. destructive


3. displacement


4. constructive


5. standing


6. stationary
   
7. standing still

And thats all for the worksheet. Make sure that you have the right answers.

For homework,make sure that you finish questions 6-14 from the green booklet. And also, dont forget to study for the test on Tuesday, Septemeber 18th.

And that was today's class. The next scribe will be... KIMBERLEY

September 13 2007

Hi i am Richard and today i am the fifth period physics class scribe

Today we corrected the Chapter 14: Vocabulary review work sheet. If you did not get all the answers or any of the answers here they are;

1.Standing wave
2.Period
3.Destructive interference
4.Node
5.Amplitude
6.Normal
7. Principle of superposition
8.Transverse wave
9.antinode
10.Frequency
11.Interference
12.Wave length
13.Angle of incidence
14.surface wave
15.constructive interference
16.Trough
17.Diffraction
18.Angle of reflection
19.Longitudinal wave
20.Wave Pules
21.Refraction
22.traveling wave
23.Crest
24.Law of reflection


Then we went through the Green booklet. We looked over these sections

D. Reflection
E. Wave Transmission in Two Media
F. wave transmission and Partial Reflection in Two Media
G. Wave interference and the Principle of superposition
I. Standing waves: The formation of a nodes


After that we went over question 1 - 5 in the green booklet if you missed the answers here they are:

1. Longitudinal and Transverse Wave
2. f = 10 crest
. --------- = 0.1 Hz
. 100s


3. f = 580 kHz = 580 x 10 ^3
. v = 3 x 10 ^ 8 m/s
. Wavelength = ?
. v = f (wavelength)
. wavelength = v 3 x 10^8 m/s
. --- = --------------
. f 580 x 10^3 Hz
. Wavelenght = 520m

4. Wavelength = 2.5 cm = 2.5 x 10 ^-2m
. v = 1470 m/s
. t = ?
. v = wavelength/ t
. t = wavelength 2.5 x 10^2 m
. ------------ = --------------- = 1.7 x 10 ^-5 s
. v 1470 m/s

5. v = 450 m/s wavelength = 0.18 m A = 2.0 mm

a)

b) f = v 450 m/s
. --- = ---------
. wavelength 0.18m
. f = 2500 hz

c) T = 1/2500 = t x 10 ^ - 4 s

d) 1 km = 1000m/8 x 10 ^ -3m = 1.25 x 10 6 5 cycles / km

e) t = 1.25 x 10 6 5 cycles x 4 x 10 ^ -4s
. -------------
. cycles
. t = 50 s


After all that we should Finnish questions 6 - 14 in the green booklet


Welll That's what we did in class today and the next scribe will be .. christine d. ...

Scribe Log 09/12/07

Yet again, another exciting day of physics has elapsed. Of course, with the ending of another physics class comes a new daily scribe. That scribe happens to be me today. Yay! Lets start!

At the beginning of class, we went over the lab that was presented yesterday. The lab was called "Waves On a Snakey". We were grouped into a team of four. Each group was handed a slinky. With the slinky, we had to create waves. Then, we recorded how long it would take for the wave to reach the other end and back. The sheet will explain the rest. For those of you who missed out, I'll upload the lab.

Chapter 14 - Lab Worksheet || Click Here!

After we corrected the lab, we watched a video. The video demonstrated effects of waves, when they are created in different circumstances. The video showed what would happen if two waves collided, the reaction that occurs when the wave pulses are displaced, and a lot of other interesting things. A worksheet was handed out after the video was completed.

18 - Transparency Worksheet || Click Here!

Near the end of the class, a vocabulary review was handed out. I'll upload it for those of you who missed it.

Chapter 14 - Vocabulary Review || Front - Click Here! -- Back - Click Here!

Here are some final notes. A test was announced for Monday. Study hard everyone! Also, the next scribe will be...RichardG.

18 Wave Properties Transparency

Transverse Waves with a Slinky

Hey, I'm Benofschool and I will be you scribe for today.

Today in class we all started on an experiment with slinkys. We used Slinkys to create transverse waves to test out a number of experiments by swinging the slinky between 2 people with another two timing and observing.. The experiments included seeing if the amplitude of the waves have a relationship with the speed of the waves, seeing if the amplitude and the speed remains the same throughout the wave. According to Ms.K this was a very frustrating experiment due to the morning class's complaints. The teacher was right. Timing the waves were really difficult do to coordination issues. Too bad we are humans, we cause human errors.

This concludes my scribe for today and homework is to finish the experiment sheet Ms.K gave us and it is due tomorrow.

The next scribe will be "Thang N."

Bye Y'all

Wave Velocity & Longitudinal Waves

Received PHYSICS 11 FORMULAE sheet.
---

CHARACTERISTICS OF WAVES ANSWER KEY
1. C, A, D, B
2. frequency
3. frequency x wavelength
4. 5 metres, 1.5 waves per second, 7.5 metres, 7.5
---

VIBRATIONS AND WAVES ANSWER KEY
1. 6.5 cm, 1.5 cm
2. 0.5 hertz, 2 seconds
3. 0.002, 0.125
4. 600 Hz, 0.57 m
5. 30 m, distance decreases
6. 30 cm, wavelength decreases
7. 2 m/s, 1 s
8. 5 m/s, 0.5 s
9. high pitched, low pitched
10. wave frequency
---

Read C. Longitudinal Waves in your booklet.
---

Homework: Wave Problems #1-5 (page 12)

Next scribe is: benofschool

Types of Waves

FISRT SCRIBE, "WAVES"

Hello fellow physics classmates,
I am Sam and I will be scribing for Fridays class. We started off by looking at how waves are made and key terms. We were given booklets out that had key terms and some formulas. We learned that a continuous or periodic wave is produced by a disturbance that is moving back and fourth continuously, that is the source is oscillating or vibrating.
click HERE to see the key terms of a wave.

To find the frequency of a wave its,
frequency = oscillations/ time
The period is the inverse of the frequency,
Time = 1/frequency.

We also had a handout to do, which we already corrected in class. We were also given another handout, I guess it was for homework because we didn't really have time to do it in class. The second sheet is CHARACTERISTICS OF WAVES. make sure you finish it for class :)

and there you have it, Fridays class. The next scribe will be

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ZEPH!

Frequency and Period Relationship