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You can use the deltaY equation to solve for Uy (which I get as ~37m/s) You can then use this with the angle for find u (~41 m/s)

Period = 24 hours. Thus using Keplers 3rd Law (r^3/T^2 = GM/4(Pi)^2) Solving for r we get r = 42,298km (this is radius of the earth + altitude) Rather than assume radius of Earth, wedetermine radius of the Earth, we use the formula for 'g' --> g=GM/r^2 (should derive this first)...

No more spots available in either Saturday class. Due to student movement, 1 spot has opened up on Tuesday's 6pm-8pm. We have completed the first and third section of Space (GPE and Universal Gravitation) and will be finishing off projectile motion this coming Tuesday.

Re: HSC Physics - Exam Paper (download) According to the scientific method, it would not have been considered a scientific theory at that stage

Re: HSC Physics - Exam Paper (download) As soon as I saw this question, I thought of Q19 from HSC 2007 -- Only a theory once it has been tested and evidence supports it

Re: HSC Physics - Exam Paper (download) lol ? F = \frac{G M m}{r^2}

Re: HSC Physics - Exam Paper (download) That is acceleration, not force.

Re: HSC Physics - Exam Paper (download) Forces would be different as force depends on mass. Surely the astronauts mass is not equal to the mass of the spacecraft! if they experienced the same force, they would experience significantly different accelerations. If that had said 'acceleration...

Hey guys, Here is the HSC Physics examination paper My MCQ answers (done in 4 mins and some were made without calculator -- so an educated guess -- denoted as *) 1. C 2. B 3. B 4. D 5. A 6. D 7. C 8. C* 9. B 10. A 11. D 12. D 13. C* 14. C 15. A 16. C* 17. A 18. B 19. B 20. B*

Per question

If there is no closed loop = no eddy current There will still be an EMF, just no eddy current, hence no braking force. #hscsez

A dimer is an oligomer, not a polymer. In a polymer, the number of monomers is not fixed.

Here you all go :) http://www.filedropper.com/hscchemistry2015 Again, excuses for the funny scanning, had to scan it with my iPad.

This is the condensation polymerisation of 1,4 butanedioic acid and ethylene glycol. First step produces (B) which is ethylene glycol succinate (not a polymer), this then forms polyethylene glycol succinate (PES) which IS NOT (D), rather it is D without one of the 'O' atoms on either the LHS...

Sorry for the pretty poor scan quality

Question states the following "A sample of pond water from a contaminated site was analysed to determine the concentration of lead ions using the following procedure."

re: HSC Physics Marathon Archive There are 3 options currently being weighed up by BoS. One of them involves the introduction of extension physics and chem. Still just talks though. Quite a bit of talk about the level of mathematics wanted in it, but I still don't see any calculus being added...

Soz guys, I have been having issues with the video editing software which I have been using -- being unable to import the videos taken from my iPhone :\ Probably my fault for getting an iphone :\ Anyway, I am going to start taking my laptop to class now and record directly into the software...

That'd be cool! Haven't shot any more videos as the last 3 lessons we have gone through their prelim exam and we have just done some calculation questions. I am going to begin to video all of our lessons (including problem solving sessions) from now. So, should pretty much be updated...

Think about it this way. Moon is 384,400km away from Earth. Figure out GPE 384,400km away from surface of the Earth. Figure out GPE on surface of Moon. Why are they different? :)