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what about 84/120 :S ?

around $1500 :S

their chem lecture was good :) but others....not really

i did: length(v) = length(o) square root blablabla but for length(o), I sub the original distance (something light year) times c so i end up with a huge number but on the second part u need to times c in the answer in part 1 as well.... so balance everythign all.... hmmmm....my explanation...

for the first one I got a bigh number of distance coz i times c , so my unit is meter (but if u changed back to light year it will be 7xx light years too), will that be alright? :S the second i got 7xx ......but damn! i put in second insetad of years :( 1 mark gone~

o yea....I just realise I didn't use the t formula, instead i used the length formula so I use find the contracted length first then use this length to find the time I got the same time as you at the end however i putted seconds instead of years T_T

i just checked the jacaranda textbook and it used Tv as well :o bt the way i used the wrong unit at the end....it is years not second damn~

Don't we find tv??? I find tv Isn't because if u are moving at fast constant speed, it can also means the space moving at that speed in relative to you too.... :S

i forgot to times 2...... i am so stupid that i was thinking V will be 0 = =''''' well...then i got 2/3 :(

On side Y, use the right hand palm rule (magenetic from left to right, then the current goes forward) so the force is downward. Therefore u put the mass on side X to balance it out. Isn't?

can anyone post up the projectile question as i actually forget what I have got? thanks :)

i got that too but in second....

how many marks is this question? I talked about mayonnaise and how its property relate to its uses.... But i didn't talk about what is mixed within mayonnaise :S (ie. vinegar+oil+egg as emulsifier) :S

I just found a conquering chem exercise sheet and it has a diagram of water treatment It said pH adjustment is at the end

FML. i put KOH too....:(

hmmmm..... i said Pressure is proportional to the inverse of volume and since concentration is proportional to the inverse of volume as well therefore Pressure is portional to concentration.... : S maths trick~

I put the same thing :) but the last one i put total pressure is decreased so all concentration drop dramatically same thing anyway....xD

i didn't times 2 :(

lol~ i got 0.something too : S

same :(