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The way the coil was wound made it impossible for the motor to turn even if it were connected properly. ie. the net force acting on each side of the coil was 0.

Yeah, it was 7.something or other for the max height he would have to jump.

*cough*...

I put A for 6 (didn't read Q properly), but the answer is definately B.

I made stupid mistakes for 2 of the multiple choice ones, no big deal though, only 2 marks. The question with the cart thinger that was accelerating and you had to choose the motion of the ball, I didn't read the accelerating bit and just put (a). The one where it said something like "what is...

The Jordan question wasn't an English question. The idea of it was that you figure stuff out, like the max height he could jump, and decide whether the passage had merit or not.

I actually thought it was a good question. I said that for an athlete to stay in the air for 2.5 seconds, he would have to be able to jump something like 7.5 metres in the air vertically up, which is of course a crock of shit.

For the projectile motion you had to find the range of the projectile, which was ~220m. For the orbit one, you had to find the mass of the moon and the second part was the orbital velocity of whatever it was that was orbitting the moon. Can't remember what my answers were for that though.

The disc spun the same direction as the magnet.

Got a needle, so it was stuck up in the air, put an aluminium disc on top, so it was horizontal and balancing. Then got a piece of string and tied a magnet to it, and wound the string up, then let the magnet spin above the disc.

My physics teacher is a senior marker and on more than one occasion has been on the board writing the physics HSC paper. He has never mentioned the word "phonons".

You do not need to mentions phonons.

I'm relying on my memory a lot for physics. But then again, I did for all of my other subjects as well. I haven't studied for any subjects too much, just hoping I can be one of those freakish kids that pull a ninety-something out of their arse :P

Anyone feel like posting the question?

Obviously not since your explanation is wrong. The only reason that your answer was correct is because you messed up twice and your messups cancled each other out. Remember that the force acting on the rod must oppose it's original motion or else the rod would accelerate and it would be...

Yup, N is negative. I thought the arrow was indicating the direction fo the force.

metres....

440*10^-9

Couldn't be bothered reading all of the answers given above, but here's what I got: 1st Question: Ring B will hit the ground first. The direction of motion of the ring is parallel to the magnetic field lines, so they won't interact. Using Lenz's law, the magnetic field will interact with the...

Lyman series aren't visible, they are Ultra-Violet..