Recent content by Kent_Cadarn

prob 85% but I only started studying for chem the day before, hehe its not going to count anyway

A 4 mark question in the paper is allocated half a page, so 25 marks can therefore be effectively answered in 6 and a bit. I think being consice is a bit part of good question answering.

Yeah I thought it was pretty easy. Schoolies was off centre and refreshing. I chose personal profile and the Paris thing as well.

It all depends on what we consider the rest frame, since the questoin asks for it from the perspective of the astronaut and 10 years have past and this is the rest frame. so t = 10 and tv = 16.7. Time is dilated i.e. gets bigger, it doesn't contract like length. This is a straight forward...

Rutherford's had electrons circling a nucleus, but this requires them to emit energy and therefore should spiral inot the nucleus and collide with it due to electrostatic attraction. Rutherford could not explain this. Bohr's postulates, his second namely said that electrons existed in stable...

It was an easy question if you could see the relationship, just like Thomson's mv^2/r = qvB r = mv/qB so as v increases (i.e. pasticle is accelerated) then B must increae so that r remains constant

Yeah q2q was easy as, for the 8 marker wrote 1.5 pages

14/15 I punched the transformer one into my calc. wrong!!!

I didn't do it but because of the new system they've been testing the water to see what the bottom level is the past two years, now they're testing the top. 4u was hard as well, all the ppl in my class reckoned it was the hardest yet. For those who do 3u and poss general, expect the same.

The crucial marks are the ones at the start, you hould be able to get most of the first 3-5 questions the rest can be really out of left field. So you might not get anything at the start or finish, be selective in reading time.

Yeah there are like 3300 ppl doing 4u about 5% up from about 2% a couple of years ago. Either ppl have gotten smarter, the course has gotten easier or more people aren't doing so well.

At our school of about 150 yr 12s, about 60 started in ext 1 maths in yr 11, thats now 17, they encouraged ppl to drop but they can't make you. My teacher put a limit of something like 90% for people to do 4 unit, 6 people started off (despite not getting 90%) under the provisor that they don't...

you're right, the first step is int. by parts but after that, even knowing the int. of arctan its messy and you'll be int. by parts for a while