MedVision ad

My answers (not including long response) (4 Viewers)

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
1. C
2. A
3. C
4. D
5. C
6. A
7. C
8. C
9. A
10. C B is the correct answer
11. B
12. C D is the correct answer
13. B
14. C
15. A
..Multiple choice was hard

16. a) 4900
b) 1.3 * 10^21 Edit: I think I changed this into something like 2 * 10^5 or something, not too sure.. Double Edit: The original answer was right, fml
17. Wrote about a plum bob hanging (to determine interial/non-inertial FOR)
18. a) 760 light years
b) 2.4 * 10^10 seconds (I used 365.25 days in one year) Edit: This is the same as 760 years
19. a) 1.602 * 10^-16 N downwards
b) 5.9 * 10^-8 seconds (that was the projectile one)
20. I used induction cooktop, loudspeakers and a power drill Edit: This is the transformation question
21. a) X
b) 0.1176Nm downwards
c) 0.049 Wb (I know, it's meant to be Tesla, FML)
23. a) Left
b) 8.3A
c) Left (towards W1)
24. a) Band E
b) Band F, 0 -> 1.3kg
25. a) Opposite charges Edit: Since it was 2 marks, I added a qualitative analysis using F = qvBsin(theta)
b) 2.5 * 10^-2 Wb (yes yes Tesla fuck you)

And yeah Quanta was pretty straightforward
I want to know which ones I got wrong, thanks :)

P.S. I had enough time to write all my answers on the data sheet
Yeah, that was an easy exam.. Still managed to lose heaps of marks :(

Edit: I remember I changed one of my answers, I think it may have been 16 b)
 
Last edited:

exiting

Member
Joined
Jun 17, 2008
Messages
46
Gender
Undisclosed
HSC
2009
isn't 16b) a bit too heavy for an asteroid?
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
Can't remember the question
But yeah you sound right :(
 

moo92

New Member
Joined
Jun 21, 2008
Messages
8
Gender
Undisclosed
HSC
2009
what was question 20 on?? :S I don't remember any of it......
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
20 was the table with three different energy transformations
 

Macdwg

Professional Mad Lad
Joined
Jun 15, 2008
Messages
93
Gender
Male
HSC
2009
You definately got the asteroid mass correct. I got like 1.something x 10 ^ 21 i KNOW that its right.

I forget alot of my answers, But which side did u put the rock on for the coil?

Sorry didnt see your answer, how did u get X by the way?
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
The magnetic field was in such a way that the X side would experience a force directed up
Hence, if you put a rock on it, it would cancel out that force and balance each other out
You then equate these forces for the next questions IIRC

Btw yay for asteroid
 

Macdwg

Professional Mad Lad
Joined
Jun 15, 2008
Messages
93
Gender
Male
HSC
2009
Was the current going to the right to y then around to x or vice versa?
Also did u point your fingers left as there was only a magnet of N, then those field lines go to south (which is left).
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
Yeah the magnet being by itself confused me.. I didn't really know where the South pole was
I assumed the South pole was on the other side of the coil, which is a safe assumption imo
 

AnandDNA

Member
Joined
Jun 22, 2007
Messages
408
Location
2148 :)
Gender
Male
HSC
2009
b) 0.1176Nm downwards

how did you get this?

i use t=fd
t=0.04x9.8x0.10

mc- 10 B<<<< still not sure though
11-A judging by other ppl's discussion here
12-D
 
Last edited:

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
T = Fd
F = ma, so T = ma * d
m was 0.04, a was 9.8 and d was 0.3, not 0.1
 

Macdwg

Professional Mad Lad
Joined
Jun 15, 2008
Messages
93
Gender
Male
HSC
2009
I assumed there was no other magnet and the lines flowed from north to south on that one magnet, therefore only placing side X in a magnetic field. Worked out that x was going down and y went up as it was pivoting. blah blah blah.

:( wish i could see the paper damnit.
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
I assumed there was no other magnet and the lines flowed from north to south on that one magnet, therefore only placing side X in a magnetic field. Worked out that x was going down and y went up as it was pivoting. blah blah blah.

:( wish i could see the paper damnit.
Lol but if it was the only magnet, the coil would not have been inside the magnetic field.. Is my thinking, I may be wrong :bomb:
AnandDNA said:
oh yeh shit i went from the current to the centre :(
Lol bl >< silly mistake
 

Thecorey0

Member
Joined
Oct 28, 2008
Messages
428
Location
Goldstein
Gender
Male
HSC
2009
How did you do 16b? I got something to the power of 16. Everything else of mine basically matches.

Btw what do you think you got raw?
 

HailSatan

Member
Joined
Oct 17, 2009
Messages
94
Gender
Undisclosed
HSC
2009
Fuck SI units... I can recall not converting to them at least twice now...
 

random-1005

Banned
Joined
Dec 15, 2008
Messages
609
Gender
Male
HSC
2009
1. C
2. A
3. C
4. D
5. C
6. A
7. C
8. C
9. A
10. C
11. B
12. C
13. B
14. C
15. A
..Multiple choice was hard

16. a) 4900
b) 1.3 * 10^21
17. Wrote about a plum bob hanging (to determine interial/non-inertial FOR)
18. a) 760 light years
b) 2.4 * 10^10 seconds (I used 365.25 days in one year)
19. a) 1.602 * 10^-16 N downwarsd
b) 5.9 * 10^-8 seconds (that was the projectile one)
20. I used induction cooktop, loudspeakers and a power drill
21. a) X
b) 0.1176Nm downwards
c) 0.049 Wb (I know, it's meant to be Tesla, FML)
23. a) Left
b) 8.3A
c) Left (towards W1)
24. a) Band E
b) Band F, 0 -> 1.3kg
25. a) Opposite charges
b) 2.5 * 10^-2 Wb (yes yes Tesla fuck you)

And yeah Quanta was pretty straightforward
I want to know which ones I got wrong, thanks :)

P.S. I had enough time to write all my answers on the data sheet
Yeah, that was an easy exam.. Still managed to lose heaps of marks :(
i got the same answers as you, cept 18, lol i mad fuked up length contraction, did know what to solve for lo or lv
 
Last edited:

random-1005

Banned
Joined
Dec 15, 2008
Messages
609
Gender
Male
HSC
2009
isn't 16b) a bit too heavy for an asteroid?
no, unfortunately you cannot estimate answers in physics, it doesnt have to be realistic, its what they asked, which is all that matters.

i remember getting something like 1.3*10^21kg from kepler
 

youngminii

Banned
Joined
Feb 13, 2008
Messages
2,083
Gender
Male
HSC
2009
ahh FUCK
my original answer was right?
FUCK
FUCK
FUCK
changed it at the last second
 

slamduncs

New Member
Joined
Sep 16, 2008
Messages
25
Gender
Male
HSC
N/A
All of your calculations look the same as mine. Except for your one where the coil was on the pivot. I found B to be 0.098T or something.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 4)

Top