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Hee, congrats :D

Haven't read the paper today yet, but heard yesterday that a girl from my school topped 3u maths :D - automatically ignores last sentence of Sparcod's post and back to lazy mode - :p

... What's, "that"? lol.

School day? What school day? :p So SoulSearcher, how did you go? :D

Ooh, congrats to the girl :)

Right. So you mean that the VALUE of the length units equals that of the angle in rads. :rolleyes: So how to you solve part (iii)? Just wondering.

Use an accelerometer, such as a pendulum. Hang it vertically, attached to the frame of reference. If it experiences a force (therefore the frame of reference is non-inertial), it will swing to one side; if it doesn't experience a force and remains vertical, the frame of reference is inertial.

Congrats everyone :D They have prizes for science comps too? o__________O There's this year 7 girl at my school who got just one question wrong in the science comp this year, and she only managed a HD. Surely it's just medals then HDs o.0

Looks like most people do 12 units - me too :D

I think part (iii) is definitely wrong. You can't have a length equal to an angle :p To solve the other two parts geometrically, sketch the situation on an argand diagram (points representing z1 and z2 both fall on the unit circle) and use circle geometry. Another hint: z2+1 is just the vector...

lol actually, you three have been looking at the wrong part of that post :p Ooh, that sounds so cool. So if you wanna go out, say, during lunch, you could just use the card? We have to go tell some teacher if we want to, but point is, you don't know if you can always find them, do you? :p

Just a quick note, it's called Simson's line, not Simpson's :p

For the first inequality, should a, b, c be all non-negative numbers? For example, if a = -2, b = -3, c = -4, LHS would be -99, whereas RHS equals -72, so LHS is not greater than or equal to RHS. Assuming a, b, c are positive, notice that a3 + b3 + c3 - 3abc = (a+b+c)(a2+b2+c2-ab-bc-ca) =...

Where's the formula? :p The error of measurements always gives a range of values that the actual measurement could be, ABOUT the mean value. So yes, you do need the +/- sign, instead of just a - sign. Otherwise you're stating that your values fall in the range of 37 to 40, instead of 37 to 43...

Talking about jerseys, I can't believe what I'm getting on the back of mine. Still couldn't figure out what at the last minute so scabbed something totally random off the first website I saw. "7SolarFlares" No, it's not random, it's an in-joke. ;) ... Of course. :uhhuh:

Actually, absolute error is half of your limit of reading. The max deviation from your mean should be compared to the absolute error, and whichever is more should be noted as the error of your measurement in your final report. And error of a measurement indicates a range in which the actual...

:rolleyes: Never happens to me. Unless I stay awake all night. But then it's not "waking up" way too early, is it? :p

Really? I thought I always have "empty concentration", having had breakfast or not :o

Congrats falcon07 and K o K o :D (And let's not freak out. Why should we ruin our last holidays by freaking out? :p)

Obviously I define "comment" to be something more than that... I guarantee that it will be :D Shall not turn up to speech day and sleep in at home :D