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hi. last year in my school the top mark receieved in a subject was 98 - MX2 100 - MX1 (four people in fact) 97 - phys 96 - eng advanced 96 - economics i heard that no-one receieves 100 in the state for physics. while 3u maths gives out a lot of high marks (4 100's just from my...

hi could someone please help out here im quite confused about this.. the total air+road resistance of a car is proportional to v^2 (v is velocity). When the engine is disengaged the car moves down as inclined plane, angle arcsin (1/30), with a velocity 30ms. Find the force necessary to...

hey im stuck in this past paper question. would realli lyk help -------------------------10 i) Find the roots of z = 1 (i can do this part) -----------------------------10 explain why ( (z-1) / z) = 1 only has nine roots, show the roots of this equation are z = 1/2 (1 + i...

could sum1 please do the following? 1) a particle is projected 30ms at the foot of an inclined plane which is 30∘ to the horizontal. For what angles of projection will the particle strike the incline plane a) horizontally b) perpendicularly 2) a vertical pole subtends an angleα at a point P...

hi, my thinking has got me a little confused. say you need to integrate root(4 - x^2) then i let x = 2sinθ , dx = 2cosθ dθ but when i simplify 2 x root(1 - sin^2 θ) , how do i know whether to put cosθ or -cosθ ??? i cant figure out the domain restrictions or whatever you need to...

Hi just one query To solve sin2x + cos2x = (sinx)^2 + 1 the book teaches to expand to -------------------2--------2---------2---------2----------2 2sinxcosx + cos x - sin x = sin x + sin x + cos x --------------------2 2sinxcosx - 3sin x = 0 ---------------------------2 then DIVIDING by...

hi i dont under this GPE thing ________________m1m2 the formula is = -G r but when u lift an object up into the air.. doesn;t its GPE increase according to this it would decrease. so as im CLOSER to the surface of the Earth is my GPE larger or smaller. im also confused since this...

one of the dot points is: present info and use available evidence to discuss factors affecting the strength of the gravitational force. what does this mean? i'm guessing its referring to _____m1m2 F = G d^2 i cant find any available EVIDNECE to discuss this

Hi i cant seem to do the following. 1) Find the relationship between a and c for 3 x - 3ax + c to have 3 distinct real roots 2) Sketch l z + 1 l < l z l + 1 3) integrate: .......-x __e____ ........-2x 1 + e ---------- edit sorry i cant work these ones out...

Hi, I learnt that speculation take up a HUGE amount of daily forex transactions (something lyk 80-90%?) Where does this go on the Balance of Payments? Is it included? If it's not then how can the BOP = 0??? please helppp

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