Ok today in class we had a test regarding electric and magnetic fields. Ms. Kozoriz wasn't there so Mr. Rahman took over again to substitute. The test went smoothly until the bell rang.
And thats all i think we did in class. So pray for your grades and hope we all did well. Good luck.
Thursday, May 29, 2008
Wednesday, May 28, 2008
Wednesday May 28th
Alright, since no ones posted a scribe for today, I'll do it mmk?
Alrighty, not to much done today. If you were in class on tuesday you should have gotten a couple more worksheets/handouts. It was mostly on these that we worked. HOWEVER. That isn't all we worked on. We also finished the last few questions on the Moving Charges worksheet, which we didn't do yesterday.
Even still that stuff wasnt the most important of everything. We also reviewed for the test which we're going to be writing tomorrow. Many (and by many I basically mean all) of the things you need to know for the test tomorrow are on the slides, which should be below this post.
Overall I think thats about everything we did. Study up guys, and good luck on the test! :)
Alrighty, not to much done today. If you were in class on tuesday you should have gotten a couple more worksheets/handouts. It was mostly on these that we worked. HOWEVER. That isn't all we worked on. We also finished the last few questions on the Moving Charges worksheet, which we didn't do yesterday.
Even still that stuff wasnt the most important of everything. We also reviewed for the test which we're going to be writing tomorrow. Many (and by many I basically mean all) of the things you need to know for the test tomorrow are on the slides, which should be below this post.
Overall I think thats about everything we did. Study up guys, and good luck on the test! :)
Tuesday, May 27, 2008
Hello. Sorry it's late. I was looking through my binder and I remembered I wanted to be the scribe for today, so here I am.
We corrected
Physics 40S Electric and Magnetic Fields Assignment
The Physics of a Cathode Ray Tube
And here are the answers:
a. PE = QE
= (1.6 x 10-19)(20 000)
= 3.2 x 10-15 J
b. Ep = Ek
Ek = 3.2 x 10-15 J
c. KE = PE
KE = ½mv22(3.2 x 10-15)
= 9.11 x 10-31 V6.4 x 10-15 = 9.11 x 10-3 1V
8.38 x 10 7m/s = V
d. T = d/v= 0.02 8.38 x 107
= 2.39 x 10-10 s
e. E = v/d
= 500 0.01
= 500 000 m
f. a = Eq/m = (500 000)(-1.6 x 10-19) 9.11 x 10-19 kg
= -8.78 x 1016 m/s2
g. V2 = V1 + at = 0 + (8.78 X 1016)(2.39 x 10 -10)
= 2.1 x 107 m/s
h. d = 1/2 at2 = ½ (8.78 x 1016)(2.39 x 10-10)
= 2.5 x 10 -3 m
We also took some notes
Cathode Ray Tube
· electrons leave the cathode and accelerate towards the anode
· the electric field, E, alone produces a force on the electrons Fe = qE causing the elections to deflect up to x
· the magnetic field, B, alone produces a force of electrons, Fb = Bqv causing the electrons to deflect down to y
1. The Find Speed V, of electrons adjust B and E until electrons hit point z
FB = Fc
Bqv = qE
V = E/B
2. To find `m` turn off E. B will deflect electrons to y where
FB = FC
Bqv/R = mv2/BqR
3. To find charge/ratio q/m = v/BR or V = E/B
Sorry if it turned out all weird. My computer's weird, I tried. I'm weird. Okay bye.
Monday, May 26, 2008
Wednesday, May 21, 2008
i need a new computer
dang.. i hate my computer..
but.. here's my pt of view, of wat we did 2day
we pretty much started off the class w/ doing our lab. i was confused w/ wat 2 do @ 1st but hopefully ended up being partly right
the lab was fr. pg 430, i believe, fr our textbooks, & consisted of taping pennies 2 a ruler @ certain pts. Ms. K. gave us a lab worksheet 2 b handed in. Pretty sure that was all we did 2day..
next scribe...
Kevin (either one =) )
but.. here's my pt of view, of wat we did 2day
we pretty much started off the class w/ doing our lab. i was confused w/ wat 2 do @ 1st but hopefully ended up being partly right
the lab was fr. pg 430, i believe, fr our textbooks, & consisted of taping pennies 2 a ruler @ certain pts. Ms. K. gave us a lab worksheet 2 b handed in. Pretty sure that was all we did 2day..
next scribe...
Kevin (either one =) )
Tuesday, May 20, 2008
THE DAY AFTER...The Long Weekend
The class stared off with a short little review of the past three classes that the few who went to Moose Jaw had missed. Ms. K went over Coulomb’s Law which is basically a formula to find the electric force:
Fe = k q1 q2 / R2
(k is the only constant in this formula with is 9 x 109)
Then she also reviewed Electric Fields:
for a test charge the formula is... E = Fe / q
for a point charge the formula is... E = kQ / R2
Ms. K also reviewed some things from grade 11 on electric fields vectors and what happens to the horizontal components when you have two or more positive charges, negative charges , a positive and negative charge and also changed plates. I don’t own Adobe Photoshop so I can’t really illustrate the diagrams, but we have plenty of notes on it anyway.
After our “spectacular” review we got a new booklet called Gravitational Potential Energy which we went over in class, it shouldn’t be anything new to anyone because and Potential/Kinetic concept is the same as from past units, there’s just a different way of calculating it because we are using Electric fields. The main thing to not forget because we will be using it numerous times is the formula:
1 joules / 1 coulombs = 1 Volt
Things to look over and study from the booklet:
Electric Potential energy – scalar, joules, just energy
Electric Potential – energy / charge, scalar, joules / coulombs or VOLTs
Potential Difference – Change in potential from point 1 to another point
After that we did the Concept – Development Practice Page, and then started the Electric Potential Worksheet. And that’s the end of our class on THE DAY AFTER…the long weekend
Fe = k q1 q2 / R2
(k is the only constant in this formula with is 9 x 109)
Then she also reviewed Electric Fields:
for a test charge the formula is... E = Fe / q
for a point charge the formula is... E = kQ / R2
Ms. K also reviewed some things from grade 11 on electric fields vectors and what happens to the horizontal components when you have two or more positive charges, negative charges , a positive and negative charge and also changed plates. I don’t own Adobe Photoshop so I can’t really illustrate the diagrams, but we have plenty of notes on it anyway.
After our “spectacular” review we got a new booklet called Gravitational Potential Energy which we went over in class, it shouldn’t be anything new to anyone because and Potential/Kinetic concept is the same as from past units, there’s just a different way of calculating it because we are using Electric fields. The main thing to not forget because we will be using it numerous times is the formula:
1 joules / 1 coulombs = 1 Volt
Things to look over and study from the booklet:
Electric Potential energy – scalar, joules, just energy
Electric Potential – energy / charge, scalar, joules / coulombs or VOLTs
Potential Difference – Change in potential from point 1 to another point
After that we did the Concept – Development Practice Page, and then started the Electric Potential Worksheet. And that’s the end of our class on THE DAY AFTER…the long weekend
Friday, May 16, 2008
Thursday, May 15, 2008
Thursday, May 15, 2008
Hey guys this is AznFlame and I'm the scribe for today. Well today in class we went over the Electric and Magnetic Fields handout that Ms.K gave us, we also were handed another hand out called Coulomb's Law in One Dimension we also did some problems from the green book can't remember which page though.Well that's all we did in class basically.
Next scribe will be Evan
Next scribe will be Evan
Monday, May 12, 2008
the day before the test (space exploration)
hey everyone! =) aebe here...
and this is what we did today.
first, we went over the problems on page 172 ( #'s 17,20,21,22,27) and here are the answers:
17. 1.989 × 10^30 kg
20. a. 3070.5 m/s
b. 86400s -> 8.66 × 10^4s or 24 hrs
21. a. 7348.469 s
b. 1508 m/s
22. a. 0.18676 m/s
b. 15.87 N
27. a. 2.03 × 10^20 N
b. 2.62 × 10^-3 N/kg
after doing the problems, ms. k went over the hand out GRADE 12 PHYSICS: GRAVITY AND APPARENT WEIGHT. then we had the review for the test tomorrow. the class ended of with ms. k showing us a video (i forgot the title.. sorry).
oh yeah... it wasn't shown in the slides... but i think ms. k said to read/study/review micro-gravity, hazzards, space exploration and why is the satellite stay in orbit.
that's all for tonight. =)
good luck for tomorrow's test! =)
next scribe.... kevin.
and this is what we did today.
first, we went over the problems on page 172 ( #'s 17,20,21,22,27) and here are the answers:
17. 1.989 × 10^30 kg
20. a. 3070.5 m/s
b. 86400s -> 8.66 × 10^4s or 24 hrs
21. a. 7348.469 s
b. 1508 m/s
22. a. 0.18676 m/s
b. 15.87 N
27. a. 2.03 × 10^20 N
b. 2.62 × 10^-3 N/kg
after doing the problems, ms. k went over the hand out GRADE 12 PHYSICS: GRAVITY AND APPARENT WEIGHT. then we had the review for the test tomorrow. the class ended of with ms. k showing us a video (i forgot the title.. sorry).
oh yeah... it wasn't shown in the slides... but i think ms. k said to read/study/review micro-gravity, hazzards, space exploration and why is the satellite stay in orbit.
that's all for tonight. =)
good luck for tomorrow's test! =)
next scribe.... kevin.
Friday, May 9, 2008
TGIF
Wow I thought the week would NEVER finish. But it's Friday now! :D and I almost forgot that I was scribe. ^_^"
So in today's class we went over a lot of problems/worksheets. For most of the worksheets Ms. K wrote the answers on the smartboard and posted it up below this scribe post.
We also went over the green textbook questions on the white board. I didn't get all the answers down.. I apologize.
But for number 6, 7 and 13 you use the F=Gm1m2/R² formula
Number 18 you use m=4π²R³/GT²
Answers that I do have;
#7: 4.17 x 10²³ N
#13: m1 = 0.37kg, m2 = 0.74 kg
#18: 5.65 x 1026 kg
She then assigned more problems for us to do from the same page (172), numbers 17, 20, 21, 22 and 27 in the green textbook.
We then watched Febi and Elizabeth's Hubble Telescope presentation, nice.
And that was the end of class!
Next scribe is aebe :)
So in today's class we went over a lot of problems/worksheets. For most of the worksheets Ms. K wrote the answers on the smartboard and posted it up below this scribe post.
We also went over the green textbook questions on the white board. I didn't get all the answers down.. I apologize.
But for number 6, 7 and 13 you use the F=Gm1m2/R² formula
Number 18 you use m=4π²R³/GT²
Answers that I do have;
#7: 4.17 x 10²³ N
#13: m1 = 0.37kg, m2 = 0.74 kg
#18: 5.65 x 1026 kg
She then assigned more problems for us to do from the same page (172), numbers 17, 20, 21, 22 and 27 in the green textbook.
We then watched Febi and Elizabeth's Hubble Telescope presentation, nice.
And that was the end of class!
Next scribe is aebe :)
Thursday, May 8, 2008
Satellite Motion
The class started off watching Mr. Same Same guy talking about Satellite motion. We were told to write 5 points while watching. Then we picked 3 sheets, The Falling Moon, Artificial Satellite, and Satellite Motion. I guess that’s it for today. Next scribe for tomorrow will be Jadanet as she requested ^_^.
Wednesday, May 7, 2008
Space Exploration
Hello everyone and I am your scribe for today! Andrew and Tang started off the class by presenting their project about Disaster of Space Exploration. Followed by Hanzel with his Space Exploration project. Then we had a short break and Ms. K gave us a sheet called Physical Gravity and Apparent Weight. We also went over the questions in Chapter 8 review sheet.
Here are the answers:
After going over the answers, presentations were continued, Kevin presented his project about the Exploration of Mars. Then Ms. K ended the class by discussing the Mass of a Central Object and Radius of Motion o a Satellite.
This is the derivation of the formulae:
Substitute V:
Escape Velocity Derivation:
I guess that’s all we did today. Good night to everyone. Next scribe for tomorrow will still be . :P
Here are the answers:
After going over the answers, presentations were continued, Kevin presented his project about the Exploration of Mars. Then Ms. K ended the class by discussing the Mass of a Central Object and Radius of Motion o a Satellite.
This is the derivation of the formulae:
Substitute V:
Escape Velocity Derivation:
I guess that’s all we did today. Good night to everyone. Next scribe for tomorrow will still be . :P
2 days scribe
05-06-08
Ms. K was back and we continued the presentations. Thanks to Jordan's laptop for the presentation. There are still few people who didn't present yet so i guess some of our time on wed will be spend for presentations again. There's only two presentations for today so for the rest of our class time, we went over the solutions for Gravitational fields worksheet.
05-05-08
Monday's class, Ms. K was away and Mr Harrison was the sub for her. At first, we just went over the answers for the universal law of gravitation sheet and here's the answer:
the rest of our class time was spent to answer problems from the green book p.172 # 6, 7, 11, 13, 18 or the review chapter8 but don't do #s 4 & 7
Ms. K was back and we continued the presentations. Thanks to Jordan's laptop for the presentation. There are still few people who didn't present yet so i guess some of our time on wed will be spend for presentations again. There's only two presentations for today so for the rest of our class time, we went over the solutions for Gravitational fields worksheet.
05-05-08
Monday's class, Ms. K was away and Mr Harrison was the sub for her. At first, we just went over the answers for the universal law of gravitation sheet and here's the answer:
- FG= 7.41 x 10^-12N
- a. m= 72.7kg
b. FG= 712.3N
c. Fw= 159.9 lb - a. double
b. 1/4 F
c. 4F
d. 16F - Gmoon= 1.62 m/s^2
the rest of our class time was spent to answer problems from the green book p.172 # 6, 7, 11, 13, 18 or the review chapter8 but don't do #s 4 & 7
i noticed that when no one was called to do the scribing, no one is really doing it. So I choose xxcoolguyxx to do the scribe for wed's class=)
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