Recent content by beadmaster

Hi, My question is based around the idea about calculating the number of possible outcomes when a given number of variables are chosen randomly (all with equal probability of being picked) a given number of times. Most importantly, I an specifically working so that order is redundant. ie AAB =...

can i just mention that that "proof" or process appears increadibly elegant, how long did it take for you to do, could i be so intrusive to ask about you level of expertise as i am taken back by again by the elegence of the solution cheers

i recognise the final answer from somewhere else, o well thanks again :)

thats great thanks, i knew the general summations but tbh i wouldn't have the wit to make some of those connections, not currently at least...:P cheers

Hi, I can't think / remeber how to write the following expresion in a closed form, the function is a summation of natural numbers between 1 and an upper limit "K", written as Sigma x with limits K and 1 effectivly, straightforward etc... what i want is the summation of all the...

agreeing with goldpheonix, the ket is to seterate the initial velocities into components with trig. & depending on question resolving the final velocity at the given time peroid with pythagoras havn't done projectiles in a while though.

Isn't that just basic SUVAT. i.e. v=u+at v^2=u^2+2as s=ut+(1/2at^2) s+vt-(1/2at^2) where: a = acceleration (9.81) u = inital velocity v = final velocity t = time s = displacement did you guys uses conservation of energy?...why?