June 10, 2010

Hey everyone,

Today in class we reviewed the portion of our exam review booklet labelled "Electricity". The point in going over this section was to review for our test tomorrow on Electricity. The answers were conducted on the front board by Hao and the new guy.

The next scribe is Matthew.

June 9 Scribe Post

Hey everyone!

I would like to start off by reminding everyone there will be a test on friday and our exam begins on tuesday in class! You only need to bring writing devices and a calculator to the exam, do not bring your books and papers! :D

Okay so we began todays class with a demonstration about Lens law. We saw that a magnet dropped down a copper tube took longer to fall then a regular piece of metal.

Next we went through a worksheet called Electromagnetic Induction (Lenz's Law)
The answers are...
1. Left side: N Right side: S Current: up
2. Left side: S Right Side N Current: down
3. Left side: S Right Side: N Current: down
4. Left side: S Right side: N Current down
5. Left side: S Right side: N Current down
6. Left side: N Right side: S Current: up
7. Left side: N Right side: S Current up
8. no current.

We then corrected the Transformers worksheet.
1. 1200v
2. 1.2A
3. 1440W
4. 1440 W
5. 12A
6.up, down
7. more, less
8. voltage, energy and power
9. step down, 20/1
10. ac, continually change

Lastly we corrected the chapter 26 review. We did not have to do questions 4 and 5.
1. 5.0 x 10^-4 v
2. 2.24x10^-5A
3. down
6. Left side: s Right side: N Current: up
7. 125:1
8. a)300 000 b) 1: 2 500
9. a) 3 x 10^5 b) 0.06A c) 18 000 W

The next few days of class will be used for asking questions about the exam and test. Have fun studying!

Monday, June 7, 2010

Hello classmates :)

Today we resumed our study of the Electromagnetic Induction unit. We started off by watching 5 pretty helpful animations that should clarify important concepts in this unit.

If you would like to re-watch them, the URL is as follows...
(Lol honestly, I totally copied the URL down wrong in class -_-" But I refound it)
http://glencoe.mcgraw-hill.com/sites/0078807220/student_view0/chapter25/
This will link you to the main menu of Chapter 25. You'll find the simulations under Concepts in Motion.

Woow! I just checked the site out quickly, and it would be really helpful if you could make proper use of it. Honestly, take advantage of this site, not just this direct link to chapter 25 for the test this Friday, but in preparation for the exam as well. Ok ok.

So the 5 animations that we viewed in class were on the following topics:
Electric Generator
Electromagnetic Induction
Application of Lenz's Law
Magnets and Lenz's Law
Wire Loop

After these simulations, we watched "Mr. Same-same's" lesson on electromagnetic induction. What is his actual name, if anyone knows? I'd want to try to search his lessons up.

The end of the video pretty much concluded today's class. No wait, we were also given the chapter's review (a worksheet). In case you didn't pick it up and are wanting to work on it, here it is:

(front side) http://i759.photobucket.com/albums/xx235/camyt/Chapter26Review.jpg?t=1275955138
(back side) http://i759.photobucket.com/albums/xx235/camyt/Chapter26Review2.jpg?t=127595563
I realized the images don't appear automatically for whatever reason. You have to click on the blank white page that opens up.


Key notes:
P. 533 (19-22) If you have not already, these questions are to be handed in tomorrow morning by 9 am.
Chapter Review Worksheet Work on it for next class.
Electromagnetic Induction Test This Friday, June 11.
- Check out the glencoe mcgraw-hill site!
No class tomorrow; staff meeting day.


That is all.

Love,
Camy

Friday, June 4, 2010

On Friday we corrected questions 14 to 18 on p.533 in the green textbooks. Later, we were assigned to answer and hand in questions 19 to 22. Here's the questions just in case you didn't copy them down:

19) A step-up transformer is connected to a generator that is delivering 125 V and 95 A. The ratio of the turns on the secondary to the turns on the primary is 1000 to 1.

• What voltage is across the secondary?
• What current flows in the secondary?

20) A 150W transformer has an input voltage of 9.0 V and an output current of 5.0 A.

• Is this a step-up or step-down transformer?
• What is the ratio of output voltage to input voltage?

21) A transformer has input voltage and current of 12V and 3.0A respectively, and an output current of 0.75A. If there are 1200 turns on the secondary side of the transformer, how many turns are on the primary side?

22) Scott connects a transformer to a 24V source and measures 8.0V at the secondary. If the primary and secondary were reversed, what would the new output voltage be?

Yay.

Tuesday May 25th

Hey People!

So today in Physics we got some work sheets that I dont have with me so I cant give you the answers to them sadly haha. We got the begining of a review for the yr. at least thats what i think it is. So yeah that's about all we did today. And now I think I'm going to learn what you guys did while i was on the saskatoon trip.

TTFN.

Katie

Next scribe is... Maraiah

Friday, March 21

Yup, so today in class we watched a video on Electric Current by Mr. Same Same. All we need to do is write 7 and a half points on what we watched.
Don't forget to finish the Chapter 23 Study which we will go over on Thursday.
That's all and the next srcribe is Jonno.
Have a good long weekend everyone.

Resistivity

Hellooooo
Today we learned about Electric Circuit
we read Resistance, Ohm's Law and Resistivity and The Direction of the Electric Current

here's the answers for Resistivity Problems ^^

by Catherine N

P.S: i lost my gmail so i use Anna's, and sorry for the short post, i was busy with my English homework ^^<3

Tuesday, May 18, 2010

so today in class we went over the rest of the questions on the moving charges worksheet. the answers for 12-16 are the following:

12 a) 5.12 x 10^-14 N
b) 2.85 x 10^-4 m
13) 4.39 x 10^7 m/s
14) 5.3 x 10^5 m/s
15) 1.3 x 10^8 m/s
16) 360 Volts

then we had a fire drill and then we went over chapter 27 study guide. the answers are posted below.

1) 1.42 x10^4 m
5) 2.6 x 10^6 m/s
6 a) 4.3 x 10^4 m/s
b) 1290 N/c
7) 1.92 x10^-16 kg
8) 15 m

good luck on the test tommorrow.
and the next scribe is SAYANA


hahaha hao gao :D

Electric and Magnetic Fields

Hey everyone sorry for missing fridays post but i dont even remember what happened on friday so i will do todays instead!

So today in class we corrected a few sheets we were handed on friday i think.

The path of a charged particle in a magnetic field
Physics of a cathode ray tube
moving charges worksheet

I only have the answers for the moving charges so yeah

The next scribe is kasey

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs330.ash1/28650_387769893363_651833363_4164614_2537054_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs330.ash1/28650_387769903363_651833363_4164615_4276202_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs321.snc3/28650_387769918363_651833363_4164616_6362757_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs321.snc3/28650_387769923363_651833363_4164617_3740996_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs330.ash1/28650_387769928363_651833363_4164618_4619806_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs321.snc3/28650_387769933363_651833363_4164619_415178_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs330.ash1/28650_387769943363_651833363_4164620_437834_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-sjc1/hs301.snc3/28650_387769953363_651833363_4164621_2654666_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs330.ash1/28650_387769958363_651833363_4164622_3592938_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs301.snc3/28650_387769968363_651833363_4164623_7938511_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs301.snc3/28650_387769983363_651833363_4164625_3307863_n.jpg

Magnetic Fields & Electric Potential

Hi guys.. I didn't know I was the next scribe. :) Anyway, here's what we did in today's class:

• Ms. K handed back the homework from p. 423 (#17) on the green booklet about Electric Fields that was worth 5 marks.

• We corrected the Concept-Development Practice Page 33-2 - Chapter 33: Electric Fields and Potential. It's the double sided sheet with drawings on it.

Electric Potential:

1. KE=decrease in PE
2. force, distance, W=Fd, increases, equal
3. Potential, Voltage
4. 1 V
5. 12 J
6. 5000 V
7. 5000 V
8. 5000 V
9. 0.005 J
10. charge
    

Oh yeah, please highlight this part on the front page of the sheet right after question #2: At any point, a greater quantity of test charge means a greater amount of PE, but not a greater amount of PE per quantity of charge. The quantities PE (measured in joules) and PE/charge (measured in volts) are different concepts. I believe this is an important information about this unit that most students get confused of. :)

• After this, we also did the Electric Potential work sheet from yesterday's class and put the answers on the white board after we were given some time to do it. So here you go:

1. 31 J/C
2. a) 3.6x10^-14 J b) 180 V
3. 12 741 119.27 m/s
4. 3.24x10^-9 J
5. a) 12eV or 1.92x10^-18 J b) 12eV or 1.92x10^-18 J c) 2.05x10^6 m/s

• Then lastly, we got a booklet that has Potential Energy and Kinetic Energy Between Two Charged Plates: Review written at the front and has 4 pages. And another sheet called Physics 40S Electric and Magnetic Fields Assignment - The Physics of a Cathode Ray Tube that may be for hand in tomorrow in class.

** Make sure you've handed in your lab that we did the other day and questions 4&5 on Electric Fields Strength. **

Reminder: Our unit test is on May 19, Wednesday.

Next scribe is Roger

Hello hello!!

1) Today, we corrected Electric Field Strength, questions 1 to 3, the rest of the questions, 4 and 5, are due tomorrow.
2) We watched a short video, here's the link, http://glencoe.com/sec/science/physics/ppp_09/animation/Chapter%2021/Electric%20Potential%20Difference.swf
3) There were four sheets handed out: ELECTRIC POTENTIAL(WORKSHEET), CHAPTER 33:ELECTRIC FIELDS AND POTENTIAL, GRAVITAIONAL POTENTIAL ENERGY(BOOKLET) and a lab worksheet (Chapter 21:Charges, Energy, Voltage), which, I believe, is due tomorrow.

*Two things are to be handed in , Electric Field Strength questions 4 and 5, and Chapter 21, Charges, Energy, Voltage.

Next scribe is Jeamille :D

Tuesday, May 11

Hello everybody! Today we corrected the questions 10, 11, 15 and 16 on page 423. I can't find the sheet that contained all the answers so please find a buddy or a classmate that has them. Mrs. Kozoriz is also an option. Also, Mrs. K made question 17 on page 423 a hand in question. Don't forget to do it !

next scribe is praisia

Elementary Charge

Today in class, we reviewed what we learned last friday.

We discussed Electric and Magnetic Fields, and Coulomb's Law.

Where k equals the constant 9.0 x 10^9, q's are the charges, and R is the distance.

ELEMENTARY CHARGE

electron = 1.6 x 10^-19

proton = 1.6 x 10^-19

The charge of an electron was measured by Robert Millikan. The charge of the electron is the same as a proton, and you have to have a multiple of this charge, because you cannot have half an electron.

1 Coulomb has 6.24x10^18 elementary charge.

In other words, "1 coulomb is a very big number"

ELECTRIC FIELDS

- Like charges repel each other, while opposite charges flow from the negative charge to the positive charge.

We did some examples on the smart board (i'm not sure if ms. K uploaded it)

And after we did the examples, Ms K gave us a handout, that pretty much explained everything we need to know about coulomb's law.

It covered Coulomb's Law in One Dimension, Coulomb's Law in Two Dimension:Equilateral Triangle, Coulomb's Law in Two Dimensions: The Square : The individual Forces & Adding the Forces. So make sure to get the handout from Ms. K if you weren't in class!

After, Ms K instructed us to answer the Practice questions on page 420, #1-5, and Questions # 10, 11, 15, 16, and 17 on Page 423. The questions on Page 423 may be for hand-in, so make sure you finish your homework!

Next scribe is domana

May 5, 2010

We started off class by reviewing the answers to the Gravitational Fields worksheet. The answers to this worksheet can be found at the link http://dmciphyz120210.blogspot.com/ . The blog at the top of the page entitled "Gravitational Fields Worksheet" is the one you are looking for. A comparison chart between the constants G and g was made as well:

G / g
- it is a constant on all planets \ - vector
- always remains the same / - on the moon it equals 1.6 N/kg
- a tiny number \ - has direction
- 6.67x10^-11 / - changes with mass; - 9.8 N/kg on earth

Additionally, a 5-10 sentence paragraph was handed in on why you believe Dark Matter exists which is backed up with proof (gravitational lensing, stars orbit, etc.).

Orbits

Thursday topic:

-We had a little quiz on Chapter 14: Satellite Motion ( CONCEPT-DEVELOPMENT PAGE) and everybody had the hand-out.

-We also answered the (Gravitational Potential Energy Questions).
Answer:
1. -3.13*10^10 J
2. -2.36*10^9 J
3. +2.98*10^9 Jjavascript:void(0)
4. 2.89*10^9 J
5. -1.18*10^11 J



-Ms. K also gave us New Formula(s):

Escape Velocity
r = Square root 2GM/R


Determining g of a Planet
g = Gm/R^2


Determining R, m, T
T = 2(3.14) Square Root R^3/R^2


Orbital Velocity
v = Square Root Gm/R



-We also had a hand-out about:

( 12.2 The Falling Moon )- It talks about Isaac Newton`s history of how he got things and especially the gravity.

( 14.5 Escaped Speed) - It also talks more on satellite positioning and orbit of earth to sun and etc. Masses, Radius and the Escaped Speed of particular planets in our solar system.

( Mass of a Central Object and Radius of Motion of a Satellite )- It shows the solution in finding the speed of a satellite.
v = 2(3.14)R/T

for m,


m = 4(3.14)^2R^3/GT^2


- lastly Ms. K gave us an assignment REVIEW Chapter 8. (1 - 7).



And that's all folks..the next scribe is Paullin? Camille? or Nailuj89?..

Blog for April 26th

wow...i forgot to do this last night...

Today in class we:
-handed in the chapter assignment (the one that requires word answers on Katie's post)
-Corrected the Chapter 8 Study Guide
-Corrected the Universal Law of Gravitation Worksheet
-Received 2 new sheets: Defining Gravitational Potential Energy and Gravitational Potential Energy Questions

Here are the answers for the Universal Law of Gravitation worsheet:
1) 7.41*10^-12 N
2) Answers on question 2 vary depending on your weight
3) a - 2 fold
b - 1/4
c - 4 fold
d - 16 fold
4) 1.62*M m/s^2, M = mass of object

I don't have time to post the rest of the answers up for the chapter 8 study guide so i suggest you borrow the answers from someone from class if you haven't already received them. Or you can pray that I'll post the answers and solutions to the questions another time.

Scribe for today is Karen

Universal Gravitation

This is for the Thursday Blog:

Just like I said, it's still the same, and everybody is busy doing their own stuff. But we have an assignment or work problem about:

Concept Review: 1-4 pages 163
Problems: 8-12 pages 172

Concept Review possible answer:
1. The earth doesn't fall because it is revolving and rotating at the same time around the sun.

2. I can't figure it out and it's kind of confusing.

3. Sorry, I'm working on it.

4. On my opinion, If the rocks dropped on your toe, it will hurt you less because gravity lessen or like absorbing the impact of the drop. P.S. I guess if it has a possibility to hurt you, why don't you dodge it, you have plenty of time before the rock hit your toe.

Feel free to comment if my Opinion was wrong.

This link might help you to understand about Universal Gravitation: I don't know how to link that one, like when you click it, it will automatically go to the URL. Maybe just highlight, Copy and Paste it. ( You know what to do ^_^ ).

http://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation

http://www.youtube.com/watch?v=0rocNtnD-yI&feature=related

By the way, April 22 was the due date of LAB WORKSHEET.
Next Scribe is KatieN

ORBIT LAB

ok..so jason will be the next scribe...

all we just did today was THE ORBIT lab..


yeap..that's all we did today...THE ORBIT lab..

if u don't know what to do..the procedures are on the green book chapter 8 page..somewhere between 1-100...

ANALYSIS:
1. force is proportional to the inverse square of the distance... F=1/(d)^2
2. i'm still having a problem w/ this one..
3. still haven't done this...

the lab needs to be hand in tom.

ms.k skipped the class today and will not be around 'til friday??????
ms.voon was the substitute...

anddddd......i guess that's all i need to scribe for today...

scribeye: kepler's 3 laws

hi guys . :)

Today we watched a video entitled "Kepler's 3 laws", where we were given a set of questions about and the answers are:

1. Copernican model

2. Mars

3. 8 minutes of arc / 1/4 apparent width of moon

4. Ellipse

5. Yes

6. focus

7. fireplace

8. poverty; illness

9. to see Tycho Brahe @ Denmark and he wanted to use astronomical data.

10. astronomy

11. he stole'em

12. no

13. planets were moving/spinning while orbiting around the sun (i just made that up but i think thats right :D)

14. 900 pages

15. mars is seen in the same position as if you were on the sun or earth.

16. Yes

17. Greeks

18. Yes

19. eccentricity is how flat the ellipse is.

20. Kepler's 3 laws:

• Planets move around the Sun in ellipses, with the Sun at one focus
• The line connecting the Sun to a planet sweeps equal areas in equal times.
• The square of the orbital period of a planet is proportional to the cube (3rd power) of the mean distance from the Sun (or in other words--of the"semi-major axis" of the ellipse, half the sum of smallest and greatest distance from the Sun)

21. Kepler told people's fortunes (astrology)

-- aaaaaand quizzes from last friday were also returned! if you weren't able to check for corrections here are the answers. :)

1. arrowhead facing down for instantaneous velocity and acceleration has an arrow towards the center of the circle.

2. the tension of the second yoyo string is twice the tension of the first one.

3. a. 13 m/s

b. 39 m/s2

4. 0.098 m.

5. up arrow- fair ; down arrow- gravitational force ; left arrow- centripetal force

6. neither.

7. 63.7 J

8. 14 J

9. 13500 J

10. 36 J

11. a. 296 N/m

b. 0.95 J

c. 0.1036 J

12. 3,594 J

13. i didnt get that sorry. :''<

-- and last! tomorrow we're doing a lab activity, so seeyou guys .:)

--next scribe will be, VAMP. goodluck!

Physcis April 15, 2010

Hello everybody !

Today in our class Ms. K was not around and Ms. Voon was our substitute teacher. We went over the worksheet given to us yesterday "Work and Energy: Springs". We answered the Chapter 8 study guide.

Here are the corrections for the “Work and Energy: springs” worksheet.

1. Fg = mg k= F/x
k = mg/x

2. a. k = F/x
= 10N/.132 m
=75.76 N/m

b. F =kx
=3.0 N/m *.55 m
=1.65 N

c. x = F/k
= 20 N/ 3.0 N/m
= 6.7 m

d. k = F/x
= 19.6 N / .04 m
= 490 N/m

3. F = 95 N/m * .025 m
= 23.75 N

4. Es = 1/2kx^2
x =
=
= 0.53 m

5.a. k =F/x
= 56N/ .18 m
= 311 N/m

b.Es = 1/2kx^2
= 1/2 *311 N/m * (0.18 m)^2
= 5.04 J

6. Es = 1/2kx^2
= 1/2* 144 N/m * (0.165 m)^2
= 1.96 J

7.a. k = F/x
= 12 N/ .6 m
= 20 N/ m



Tomorrow we will have test in Circular motion and Work/ Energy. So guys please stuDY? LOL wahhahaha. Goodluck to all. :)

Camille will be the next scribe.