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*sigh* F = mv²/r = qvB rearrange to mv = qBr, ie. p = qBr. (ii) substitute to find m (iii) You now have mv, rearrange the mass dilation formula and substitute to find mo.

As in v = 2πr/T. Yes, I used it. It's allowed, and much faster than using the Fg = Fc method.

"HSC Exams - Trade them with your friends to collect the whole set!" On topic: Post Q's 25 - 27!

Indeed. I intend to sit here and do absolutely nothing whatsoever ('cept post on bos) until my hsc arrives. Nothing at all. *waits*

Rama_v incorrect Quirky headlines strike again

Me! I can't wait to go back to having lots of hot sex! Oh, wait. Nevermind.

Is it wrong for someone to have had a thorough knowledge of the entire syllabus and to be confident that they were able to address all the relevant course content in even the 'essay' type questions today?

The exclusion principle is not really necessary to explain what Pauli contributed to beta decay, (the neutrino is the main thing). Although now that I think about it, the neutrino idea originally arose from exclusion principle. That's because exclusion principle showed that it is not...

Yes... That question's Part three was absolutely ridiculous. (I'm starting to think I know the syllabus better than the people setting the papers) My answers for that question: (a) Einstein predicted time dilation (b) This was experimentally shown when 2 synchronised atomic clocks...

Really? My final answer for (iii) was similar to seadonkey's, somewhere near 1.66e-27... can't remember exactly.

Question 7 should be cancelled because it's such a shit diagram.

I checked with my calculator, the number I got was I² = 4900000 I = 2213.59. Which seems too ridiculously large of a current to be correct... I may have just been off by a factor of 100 due to calculator mistakes.

Do projectiles travel in a straight line? That's right. Therefore the velocity is constantly changing.

I meant that you were right for the first part. Yeah, that's what I did, (weight of rod * 9.8) = k*I²/d (I² rather than I1 and I2 because the currents were equal, since they came from the same source) Then I solved for I, and got like 2000 amps, it seemed wrong to have a current that...

das ist correct... But how on earth were you meant to calculate the minimum current? I couldn't think how... So I said F due to repulsion had to be such that it was greater than force due to gravity, and got over 2000 amps. I'm sure that's wrong, but I coudln't think what else to do, there...

This is what stopped me from talking about the Slingshot Effect, because (i've forgotten already) didn't it say they did the burn after circling the moon? In the actual slingshot effect with satellites, there's no firing of motors after they swing out of the planet's orbit. Therefore this...

My answer: Two applications of induction are cooktops and braking. I then very briefly described how e-m braking works. THen I said I got info from the net, textbooks and scientific journals, checked them for consistency, checked their sources. Then I said that the most reliable ones...

Question 15 would be D, right?

More to the point, have we established which were the correct answers yet? If so, post them.