On Tuesday, we corrected a couple of worksheets we got from the previous day. One is called Exercises - Refraction and the other is called Refraction. They both have similar titles but they are different. The answers to Refraction are on the post previous to this one. After correcting the worksheets, Mrs. K assigned us lab work.
TODAY, we just continued on with our lab work and we handed it in at the end of class!
****Please talk to Mrs. K if you missed the lab or any work! I CHOOSE ASHLEY A. TO SCRIBE NEXT!
Wednesday, February 25, 2009
Tuesday, February 24, 2009
Thursday, February 19, 2009
Thursday's class!
Today, Mrs. K started the day by going over the answers in the worksheet, Waves in Two Dimensions Unit: Reflection & Refraction given the day before, when they watched a video. The answers are posted in the blog, it is titled, "Waves2D". Unfortunately, I wasn't able to watch the video but you can just ask Mrs. K for further knowledge about the answers.
After that, she read some notes in "Waves in Two Dimension" from pages 7 to 9. In page 9, we learned that when the waves move from deep water to shallow water, their speed decreases, therefore, the wavelength of the waves must also decrease just like in our previous studies in "Waves in One Dimension", it stated that when a wave move from a fast medium to a slow medium, the transmitted wave moves slower and the wavelength decreases as well.
The notes, in my opinion, are hard to understand and they move from one topic to another pretty fast, so if you are confused about anything, just ask Mrs. K before tomorrow's class.
After reading the notes, she gave us a review paper about water waves moving from one depth to another, it is called, Water Waves Moving From One Depth to Another. (: and a worksheet, Waves in Two Dimensions - Assignment 1 that was supposed to be handed-in after the class but she said we can hand it in tomorrow and that pretty much covered the second half an hour of the class.
...and the next scribe will be yassin!
Tuesday & Wednesday!
On Tuesday, we received a booklet called Waves in Two Dimensions. We read through the first few pages and learned how to draw the incident and reflected wave rays. We also received two papers: Guideline to Drawing Problems and Waves in Two Dimensions - Assignment 1. For Waves in Two Dimension - Assignment 1, we were asked to do the first two question.
On Wednesday, we got our tests back and corrected them. We also went through the two questions that were assigned the previous day. Afterwards, we watched a video and answered some questions on a handout given by Ms. K.
Oh! And the next scribe will be Jen-Jen!
On Wednesday, we got our tests back and corrected them. We also went through the two questions that were assigned the previous day. Afterwards, we watched a video and answered some questions on a handout given by Ms. K.
Oh! And the next scribe will be Jen-Jen!
Wednesday, February 18, 2009
Saturday, February 14, 2009
Thursday & Friday
Thursday:
I was supposed to scribe for Thursday, unfortunately, I was not there. Fellow students told me that we had an assembly, then did a worksheet that I dont know anything about. Please see Ms Kozoriz or anyone in the class for what we did.
Friday:
We had a substitute, she gave us five minutes to review, and we wrote the test. I thought the test was easy.
We were not assigned any homework for the last two days of school before the long weekend. Hope everyone's having a good long weekend so far. See you all on Thursday! (dance people will be performing for the feeder school, both Tuesday and Wednesday, I think.)
The next scribe will be Pamela Gaza.
I was supposed to scribe for Thursday, unfortunately, I was not there. Fellow students told me that we had an assembly, then did a worksheet that I dont know anything about. Please see Ms Kozoriz or anyone in the class for what we did.
Friday:
We had a substitute, she gave us five minutes to review, and we wrote the test. I thought the test was easy.
We were not assigned any homework for the last two days of school before the long weekend. Hope everyone's having a good long weekend so far. See you all on Thursday! (dance people will be performing for the feeder school, both Tuesday and Wednesday, I think.)
The next scribe will be Pamela Gaza.
Wednesday, February 11, 2009
Wave Interference and Principle of Superposition
So basically we just went over the worksheets that were handed to us yesterday and corrected them. They were about superposition of waves and constructive and deconstructive interference. Here are the answers in case if someone needs to look at it again
Sorry if it is hard to read. As well we did wave problems in the book and did questions 2,5,7,11,12 and 14. The answers to these questions are already posted up on the blog by Ms K. Also, she gave us a Physics: Principles and Problem Crossword puzzle. If you don't have one ask Ms. K.
Right now for me Physics is some what difficult for me but hopeful I will get it.
For Reminders: We have an assembly tomorrow first period in the morning and our physics test will be on Friday.
So the next scribe will be.....Praisia.
Sorry if it is hard to read. As well we did wave problems in the book and did questions 2,5,7,11,12 and 14. The answers to these questions are already posted up on the blog by Ms K. Also, she gave us a Physics: Principles and Problem Crossword puzzle. If you don't have one ask Ms. K.
Right now for me Physics is some what difficult for me but hopeful I will get it.
For Reminders: We have an assembly tomorrow first period in the morning and our physics test will be on Friday.
So the next scribe will be.....Praisia.
Tuesday, February 10, 2009
Waves
For today's class we begun by watching a video. The video was mainly about things we've already learned.
We then went to correct the work sheet Wave Characteristics. The answers to this work sheet should be on the slides. Since the slides were not posted yet, I'll give the answers. I'll only be posting the final answers since I'm unable to make the full equation.
1 a. 1.65m
1 b. 16.5m
2. 2.9m
3. 9.2 x 10^5 Hz
4. 12m/s
5 a. T = 8s
b. f = 0.125 Hz
c. 16 cm
d. 162m/s
We also corrected the Study Guide sheet and for those who missed the answers here they are:
Wave Interference:
- The speed of a mechanical wave does not depend on the amplitude or the frequency of the wave.
- It only depends on the properties of the medium.
- In a given medium, the speed of a wave with a large amplitude is equal to the speed of a wave with a small amplitude.
- In a a given medium, the speed of a high-frequency wave is equal to the speed of a low-frequency wave.
- When a wave reaches a boundary between one medium and another, the wave that reaches the boundary is called the incident wave.
- The wave that moves through the new medium is called the transmitted wave.
- Some of the energy of the incident wave moves backward from the boundary and is called the reflected wave.
- If the difference between the two media is small, most of the energy of the incident wave will be transmitted.
- If the difference between the two media is great, little of the energy will be transmitted.
- When a wave passes from a more dense to a less dense medium, the reflected wave is erect.
- When a wave is transmitted from one medium to another, the frequency of the wave does not change.
- The speed and the wavelength of the wave do change.
Superposition of Waves:
- When two or more waves move through a medium, each wave affects the medium independently.
- According to the principle of superposition, the displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves.
- Constructive interference occurs when the wave displacements are in the same direction, and results in a wave with a(n) greater displacement.
- After the two pulses have passed each other, they have their original shape and size.
- Destructive interference occurs when the wave displacements are in opposite directions.
- If the amplitudes of the two pulses are equal but opposite, the displacement produced when the pulses meet is 0.
- If the amplitudes are unequal, destructive interference will not be complete.
Standing Waves:
- When two waves meet, a point in the medium that is always undisturbed by the wave is called a node.
- A node is produced by destructive interference.
- When two waves meet, the point int he medium where there is the greatest displacement is called the antinode.
- An antinode is produced by constructive interference.
- If the period of a wave is equal to the time it takes for the wave to travel to a fixed point and back, a(n) standing wave is produced.
- In this wave, the nodes and antinodes are stationary and the wave appears to be standing still.
We were given 2 worksheets to work on. Wave Superposition and Principle of Superposition, we were told Wave Superposition would be handed in. I've uploaded both worksheets onto to the blog.
Next Scribe: aapuya
We then went to correct the work sheet Wave Characteristics. The answers to this work sheet should be on the slides. Since the slides were not posted yet, I'll give the answers. I'll only be posting the final answers since I'm unable to make the full equation.
1 a. 1.65m
1 b. 16.5m
2. 2.9m
3. 9.2 x 10^5 Hz
4. 12m/s
5 a. T = 8s
b. f = 0.125 Hz
c. 16 cm
d. 162m/s
We also corrected the Study Guide sheet and for those who missed the answers here they are:
Wave Interference:
- The speed of a mechanical wave does not depend on the amplitude or the frequency of the wave.
- It only depends on the properties of the medium.
- In a given medium, the speed of a wave with a large amplitude is equal to the speed of a wave with a small amplitude.
- In a a given medium, the speed of a high-frequency wave is equal to the speed of a low-frequency wave.
- When a wave reaches a boundary between one medium and another, the wave that reaches the boundary is called the incident wave.
- The wave that moves through the new medium is called the transmitted wave.
- Some of the energy of the incident wave moves backward from the boundary and is called the reflected wave.
- If the difference between the two media is small, most of the energy of the incident wave will be transmitted.
- If the difference between the two media is great, little of the energy will be transmitted.
- When a wave passes from a more dense to a less dense medium, the reflected wave is erect.
- When a wave is transmitted from one medium to another, the frequency of the wave does not change.
- The speed and the wavelength of the wave do change.
Superposition of Waves:
- When two or more waves move through a medium, each wave affects the medium independently.
- According to the principle of superposition, the displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves.
- Constructive interference occurs when the wave displacements are in the same direction, and results in a wave with a(n) greater displacement.
- After the two pulses have passed each other, they have their original shape and size.
- Destructive interference occurs when the wave displacements are in opposite directions.
- If the amplitudes of the two pulses are equal but opposite, the displacement produced when the pulses meet is 0.
- If the amplitudes are unequal, destructive interference will not be complete.
Standing Waves:
- When two waves meet, a point in the medium that is always undisturbed by the wave is called a node.
- A node is produced by destructive interference.
- When two waves meet, the point int he medium where there is the greatest displacement is called the antinode.
- An antinode is produced by constructive interference.
- If the period of a wave is equal to the time it takes for the wave to travel to a fixed point and back, a(n) standing wave is produced.
- In this wave, the nodes and antinodes are stationary and the wave appears to be standing still.
We were given 2 worksheets to work on. Wave Superposition and Principle of Superposition, we were told Wave Superposition would be handed in. I've uploaded both worksheets onto to the blog.
Wave Superposition
Page 1
Page 2
Principle of Superposition
Page 1
Page 2
Just click on the image and you should be redirected with a better view of the worksheet.
Next Scribe: aapuya
Monday, February 9, 2009
Test This Thursday!
February o9 /o9
Today in class the following worksheets were corrected:
Today in class the following worksheets were corrected:
- Frequency Worksheet
- Period & Frequency Problems
- Characteristics of Waves: Physics 30S
- Concept-Development Practice Page - Chapter 25: Vibrations & Waves [25-1]
- Vocabulary Review
- Chapter 14 Study Guide (Only corrected the first page - the rest will be handled in tomorrows class.)
Answers to the worksheets, which were given to us last week, are posted up and there is an upcoming test this Thursday, February 12, of Chapter 14: Wave Properties.
Note: On tests, it is very important to show all work when you are calculating for the uknown. The more work you show the more marks you'll get for each question.
A brand new worksheet was picked at the end of class. :)
NEW SCRIBE IS: randalls
Wednesday, February 4, 2009
Tuesday, February 3, 2009
Scribe List
This is The Scribe List. Every possible scribe in our class is listed here. This list will be updated every day. If you see someone's name crossed off on this list then you CANNOT choose them as the scribe for the next class.
This post can be quickly accessed from the [Links] list over there on the right hand sidebar. Check here before you choose a scribe for tomorrow's class when it is your turn to do so.
This post can be quickly accessed from the [Links] list over there on the right hand sidebar. Check here before you choose a scribe for tomorrow's class when it is your turn to do so.
PAMpers _zhai03_ yassin traaaan | Jan jdeguzman | DakotaLee Flash3N |
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