# Recent content by nightweaver066

1. ### UNSW Subject Reviews.

ACTL4002 Ease: 4/10. It is not easy tying everything in your undergrad together and applying it to real life scenarios. This course and the previous really forces you to think widely. Content: 7/10. Somewhat interesting, mostly important where relevance is somewhat related to what path you want...
2. ### HSC 2015 MX2 Integration Marathon (archive)

Re: MX2 2015 Integration Marathon Pretty ugly. You can use x^2 = \sec \theta and x^2 = \tan \theta for each integral respectively. Simplify etc. etc. Then use y^2 = \sin \theta to end up with something like \frac{y^2+1}{2y(1-y^4)} which we can quickly decompose (using our best mate the...
3. ### UNSW vs Macquarie Actuarial Studies Round 2

In my year, i think there were heaps of co-ops. Maybe 10 out of 180 students or more?
4. ### Math1251

Ohh right. Probably only students who took MATH1251 in that year have it. If you're looking for more practise, MathSOC will be releasing older papers with solutions soon. :)
5. ### Math1251

Are you looking for answers or the quizzes?
6. ### UNSW 2015 Sem 1 Results Thread

Math3901 - 92 ^_^
7. ### UNSW Subject Reviews.

ACTL3141 Ease: 7/10. Not too bad, really the only conceptually difficult thing was figuring out exposures (which I still don't get). Content: 9/10. Content was linked very cohesively and I understood the relevance of each part of the course. Was somewhat interesting. Lecturer: 9/10. Sherris is a...
8. ### The UNSW Scaling Thread

Adding courses that haven't been talked about: MATH2111 - decent-good upwards scaling MATH2601 - no scaling MATH2621 - no scaling really MATH2221 - no scaling (so easy though. very easy HD if you learn the methods) ACTL2111 - no scaling ACTL2102 - no scaling and they say have faith in scaling...
9. ### HSC 2015 MX2 Integration Marathon (archive)

Re: MX2 2015 Integration Marathon The question was in a unique team event Integration Bee paper, specially designed for one team haha. Of those questions, some probably required uni maths.
10. ### HSC 2015 MX2 Integration Marathon (archive)

Re: MX2 2015 Integration Marathon I see you're on an integration bee spree with your questions haha
11. ### HSC 2015 MX2 Integration Marathon (archive)

Re: MX2 2015 Integration Marathon Good job. :) I used a trig substitution and I think it worked out, though I couldn't be bothered resubbing in for $x$ haha.
12. ### HSC 2015 MX2 Integration Marathon (archive)

Re: MX2 2015 Integration Marathon A fun integral from 2015 UNSW Actuarial Society Integration Bee, \int \frac{\sqrt{x^2+1}\left[\ln\left(x^2+1\right) - 2\ln x\right]}{x^4} \, dx
13. ### Lenz's Law requirements

Eddy currents are induced currents that are circular. The induced current must flow in such a way to oppose the initial change in flux. Say if you're moving a north pole towards the end of a solenoid where both ends are connected, then current can flow throughout the solenoid and through this...
14. ### Lenz's Law requirements

Lenz's law always applies so long as there is an induced EMF. For example, you move a north pole towards a wire. It experiences change in magnetic flux => induced emf (Faraday's law) => eddy currents in this case. They circulate in such a way to produce a south pole to oppose the change in...
15. ### ASB Dean's List

High 85s Oops you meant this year. Probably like 86-87