My answers (not including long response) (1 Viewer)

[slamduncs]

Also you place the mass on side Y. 100% positive.

 

[youngminii]

lol i'm 100% positive you place mass on side X

 

[random-1005]

Also you place the mass on side Y. 100% positive.

wrong noob, and your magnetic field strength is wrong lol

 

[HailSatan]

I got something x10^21 for the asteroid too.

 

[exiting]

Haha I got x10^21, but then I was thinking hmm...

 

[random-1005]

Haha I got x10^21, but then I was thinking hmm...

its called a trick, they made the answer to be a real big number to catch out the noobs that dont believe in themselves

 

[youngminii]

aww god damn i screwed the asteroid q.

 

[Macdwg]

Who got the frequency of the lightwave in the 2nd last question from the experimental table to be 8.something x10^-14?

Also i think u place it on the Y side. I fucked up the length contraction and time dilation question, i hate those questions because i feel i cant interpret them proper. Stuffed the projectile question, didnt even realise it was a projectile haha, thats 6 marks or so gone.

 

[random-1005]

Who got the frequency of the lightwave in the 2nd last question from the experimental table to be 8.something x10^-14?

Also i think u place it on the Y side. I fucked up the length contraction and time dilation question, i hate those questions because i feel i cant interpret them proper. Stuffed the projectile question, didnt even realise it was a projectile haha, thats 6 marks or so gone.

lol, they specifically said constant acceleration in the question, and they asked for a time, and the shape was a parabola, one would be thinking projectiles

 

[carlytse621]

Who got the frequency of the lightwave in the 2nd last question from the experimental table to be 8.something x10^-14?

Also i think u place it on the Y side. I fucked up the length contraction and time dilation question, i hate those questions because i feel i cant interpret them proper. Stuffed the projectile question, didnt even realise it was a projectile haha, thats 6 marks or so gone.

On side Y, use the right hand palm rule (magenetic from left to right, then the current goes forward) so the force is downward. Therefore u put the mass on side X to balance it out. Isn't?

 

[Macdwg]

If you noticed there was no south pole next to the y, no magnet at all infact, there was just one magnet on side x, meaning that only x is exposed to the magnetic field.

Current flows from Y side through to X, meaning x is going downwards.

I could be wrong, the question was very open to the interpretation of the individual, thus why it sucked

 

[Macdwg]

lol, they specifically said constant acceleration in the question, and they asked for a time, and the shape was a parabola, one would be thinking projectiles

Didn't even cross my mind hey, i just saw electric field and thought about a centripetal force. So i equated a few formulas and got an answer, although wrong hehehe.

 

[slamduncs]

Someone post up the question and I will show you why it is Side Y. And why 0.098T is the correct B.

 

[00iCon]

10) C is wrong
and there are argumants about Q5.
are you sure Q12 is B?
For the Table i used a battery charger, CRT TV and PC PSU. That idea with the induction cooktop is excellent!

 

[Thecorey0]

Who got the frequency of the lightwave in the 2nd last question from the experimental table to be 8.something x10^-14?

Shouldn't it be quite big, since c=wavelength *frequency. The wavelengths are 10^-9, therefore the the frequency should be around around 2*10^15. Though I have probably done something ridiculously stupid.

 

[00iCon]

Someone post up the question and I will show you why it is Side Y. And why 0.098T is the correct B.

it's side X, but ur rite with the 0.098T

 

[annabackwards]

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 Edit: I think I changed this into something like 2 * 10^5 or something, not too sure
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

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

I was tossing up between Wb and Teslas too... and i put Wb ><"
Let's hope they're not gay and deduct a mark from us for doing that lol.
Gah i should've just remember it was Wb m^-2 and there would be no problem!!!!!

Aside from that and question 20 (which i had no idea what i was doing) and of course MC which i suck at, i think i did alright

 

[slamduncs]

If you noticed there was no south pole next to the y, no magnet at all infact, there was just one magnet on side x, meaning that only x is exposed to the magnetic field.

Current flows from Y side through to X, meaning x is going downwards.

I could be wrong, the question was very open to the interpretation of the individual, thus why it sucked

Or this guy could just explain it perfectly. Also with the B field:

Since the torque is only provided by side X (as it is the only side inside the field) you can use T=Fd.

F=BIL. so T=BILd. B=T/ILd. Which was 0.98.

Alternatively you can say that force of side X pushing down must equal that of the mass pushing down on Y. Hence (.04 x 9.8) = BIL

B=(.04x9.8)/(20x.2)=0.98T

Therefore, wrong, noob.

 

[exiting]

Hmmmm, why was the weight on the asteroid given?

 

[Macdwg]

Heres a pic i drew haha. Dont have much more than that.