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Usually questions would refer to Einstein's thought experiements. I'd talk about: - good theories can be supported through evidence/experiments - Einstein's theory of relativity initially didn't have supporting evidence (Though experiements weren't real experiments) and go through reasons why...

Although the physics equations can be derived from maths equations, it is not required by the syllabus, so don't do it. The physics and maths syllabus require different ways of solving the problem, and that is what the markers expect. So NEVER use the "maths method" for a physics problem or...

I think the force between two apples you're talking about is refering to Newton's Law of Universal gravitation and not potential energy. For force between 2 masses, since G is a small constant, small masses (like things on Earth) will produce insignificant F In E=mgh, E refers to work done to...

For centripetal force, r refers to distance from centre of motion So if it's a satellite above Earth, then it's radius of Earth + altitude

Well it depends on what you define as escape, since reseach suggests black holes emit particles. Read this article first! It only takes a few minutes It's from 2006 by Seth Lloyd (from the Department of Quantum Mechanical Engineering at the Massachusetts Institute of Technology) and he builds...

Of course you need simple algebra and trig for physics. I'm just saying what is required for physics and ext2 maths is different. For example in projectile motion, in physics you're required to solve problems using the equations of motion v=u+at...... While in maths, you're required derive...

Of course HSC mark! Not only does it contribute half to your UAI, doesn't it determine the amount your school component is scaled. So if your rank is low, but everyone at your school does well in the exam, you'll probably still get a good scaled mark.

it was easy. Calculations aren't hard. There wasn't any question that required memorising loads of equations. The best ever.

Units depends on the K expression units for [] is mol/L but if it is []^2, then the units are squared as well (mol/L)^2 and so on.......

Found this from google books http://books.google.com/books?id=ymtDOXqm15IC&pg=PA8&dq=detergent++builders+environment&ei=gWgWSaHfDoLwsQP_hbmHDA it is a handbook on detergents and defines what a builder is. Its usefel for further reading, but I think builders aren't that important for the hsc

I'm not sure but I'll try answering it... Question1: r=22.0cm = 0.022m 3 rev/sec --> T=1/3 sec centripetal velocity v = 2πr/T = 2π (0.022) x3 = 0.132π m/s **Centripetal acceleration = v^2/r = (0.132π)^2 / 0.022 = 6π^2 m/s^2 towards the centre of motion **centripetal force =...

@jm01 : you missed out the "π" 3 rev/sec = 3x2π radians/sec, but you don't need this in physics, only in 4Unit maths and you MUST NEVER use maths methods for physics for vice versa linear velocity: v=distance/time for circular velocity: v=circumference/time thus circular velocity: v= 2πr/T ...