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.
Monday, May 12, 2008
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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