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ty.. when it says to provide evidence for theory of relativity.. do we only talk abt time dilation.. wot abt in general and other dilations?? Or is it okay to just talk abt time dilation and that'll be enough.

hi.. im playing the piano. does anyone have the piano score for this song? "apologise" by timberland ? thx :)

oohh.. nice, thx Also, Q: it was 50 years before experimental evidence was available to support Eintein's theory of relativity. Outline one piece of evidence in support of his theory.

this is an 6 mark question so make sure u answer as much as u can :) Q: Evaluate the michelson-morley experiment A : ? need help plz.. i cant seem to write anything Also, another question. From the length contraction formula, is the length measure in cms? m? .. the book doesnt say...

i understand now a bit .. but one thing i don't get, why is the length (x) value from graph B different from length (2x) value from graph A? they're the same rectangle.. also, in graph B, u find out that X is rt2 .. u can divide that by 2 (that'll give u x cor ordinate) , then sub into...

noo, p(x/2 , y) can still be variable.. and graph b is perfectly normal..

The method i used (used graph B) Area = xy = x root. (4-x^2) [subbing y = root. (4-x^2) ] let derivative = 0 and u'll get x = root 2 and u'll get y = root (3.5) The second method i used (used graph A ) Area = 2xy = 2x root.(4-x^2)...

wouldnt this experiment be similar to that of the G-force experiment? well, i holded up a spring balance with some weight on it.. i go on an elevator and note the change in mass.. uh, after second thought.. its quite different .. hehe~

this doesnt make sense ..

velocity, ur wrong! its 1.5 second instead of 3 seconds.. and f(sex) was right.. it took 3 seconds to reach max then drop down (to the ground).. so 1.5 sec to reach max.. either way.. ur final answer for question 1 was wrong anyways.. u = 29.4 / sin15 "u" does not equal to 45.21 m/s ..

how did the plus sign change to minus sign from ur last step?

really.. too bad i cant read chinese .. im canto tho :P

if u always take -9.8, wouldnt that contradict wot decypher said? he said that if the ball moves up, u take +9.8 (assuming that up is positive) BUT, -9.8 when the ball goes down.. so u cant "always" take -9.8 right? :confused:

here, mg is the formula for weight.. so u jus wana find the weight minus from thrust (which determines the force).. if u take -g .. the weight would be negative..

for those equations tht has "a" (for acceleration due to gravity) should i put -9.8 or +9.8 ?? For a projectile that is parabolic, do we change the signs of 9.8 when we go up and when we go down? or do we keep the sign of 9.8 constant .. . ...

boooo!!, ur not pregnant! i remember reading this case , exactly same wording, and we have to analyse it at school.. its part of this pdhpe, social thing etc .. lol , and u made a big mistake by typing it in exact wording..

nahh, prison break is too tricky to have a happily ever after ending.. lol .. im really hoping that sarah comes back alive and the head in the box was someone elses lol.. =/ season 3 suked.. anyone recemmend any other series (house probably?, lost?) thats equivalently good as prison break?

hi ssglain, do u no james wang.. he said he knows u .. aha

OMG.. thats easy but i got it wrong.. This question was in my complex test paper and i stuffed it up.. now i no how to do it.. all u do is draw the locus of that, then find its center using trig .. and u'll end up with an equation of circle if u find out its center/radius .. easy!

how would that help u factorise .. thats only solving x and is needed for factorising over complex..