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Man, I'm pumped for Maths Ext 2 and Physics next year :D I'd love to see you try picking up Chemistry in a bridging course, having not done it in Senior High School -- Trust me it wont be easy. :P

Distance is a scalar quantity, notice how all the maths distance formulas (eg. p.d. and distance-formula) have absolute values or square roots/squares? Displacement on the other hand is a vector quantity, and has a direction, and can be negative depending on which way you call positive.

Re: Have you started hsc work yet? Yeah it's I think you can choose from Logs, Circle Geometry, Polynomials, and one more topic that I can't recall.

And why should 4 unit students sit the 2 unit exam? There'd be no point as it's obvious that all the 4 unit people will get the top scores in the test.

Was a typo, has been editted already.

Hi, It seems like I'm on a roll here, but I think the answers may be wrong, so here's the question anyway: "Calculate the gravitational force between the Moon and the Earth. The mass of the Moon is 7.35*1022kg, that of the Earth is 5.974*1024 kg. the diameter of the Moon is 3467km, that of the...

Answer is 1.93 * 105 km

No I am not. Thanks, Jason

Hi, I have another question with Space, hopefull its my last one, but yeah thanks for answering my other one. "Calculate how far an astronaut would need to be away above the Earth in order for his weight to be 0.01 of his weight on the Earth's surface" I tried it but failed miserably...

Re: Have you started hsc work yet? First dot point actually is "define weight as the force on an object due to a gravitational field"... =P Not quite W=mg

Hi, For the quadratic results, which result is correct? (As you get two solutions) Thanks, Jason

Hi all, I have another projectile motion question... Thanks if you can help me. "A cannon ball is fired at 80m/s at an angle of 45 deg to the horizontal. Calculate the height at which the ball hits a verticle cliff 150m away" Thanks, Jason

Well, I retained all my Year 8 knowledge about electricity and proved my teacher wrong about the Van de graff generator (he didn't know that you can see that the spark jumps from Earth to the globe, indicating that electrons are coming up from Earth, and he thought that the top was negatively...

Yeah not to mention their irreversible seating and the squeaking that happens in the vestibule. Most (like nearly all) of the accidents that Tangaras have been involved in have resulted in them tipping over. Oh and for the City Circle, a train coming from the Bankstown Line goes around the...

What the hell are you talking about? Personally I don't like Tangaras as they have serious problems with their airconditioning system. It's not uncommon for their airconditioning to fail, and all different carriages often are different temperatures so if I find a carriage to be uncomfortably...

Milleniums don't operate on North Shore, unless if there's trackwork any of the Sector 2 Lines, see my previous post. It's an OSCAR that you're seeing.

You are talking about the South Coast Line, and they're not Millenium trains, they're H sets (OSCARS - Outer Suburban CARs). Again, they're OSCARs.

Yeah you're correct, but the question is if you went through the whole process of solving it and then substituting back into the equation to find that it doesn't work. Most people cannot say straight away that it's no solution.

No you dont, the Illawara Line doesn't get any Millenium trains as the guards/drivers aren't trained to operate it. The Milleniums only operate on Sector 2 (ie. Airport/East Hills, South, Bankstown, Inner West Line). Again, the Milleniums don't usually operate on the North Shore/Western Lines...

How about, Solve for x: |x+2| = -5 (If this takes you more than 0.1 of a second to figure out then you're an official novice :P)