Recent content by greener1993

Hey :D, I'm doing an experiment to determine the energy lost of a ball after each bounce. I am doing this experiment to 3 types, tennis ball, squash ball and ping pong ball. I have already determined what I need to do to work out the energy lost of a ball as a percentage after each bounce...

Just had a think about it and look some stuff online. For the first one do you factorise x^2-x-2 = (x-2)(x+1) so x=2 or x=-1. I then drew this on a graph to find out when y is greater than 0. Which would be -1>x>2. I don't know if this is right as i haven't used soultion a in the question :S

not a clue. i worked out X is 2 or x=-1. I don't see how this relates to my question when there in the complex form of x(x-2)<2-x. I had surgery on the 12th and i missed a lot of this. I am sorry but I seriously don't know what's happening.

2) sorry i believe your confused, Nmc^2=3nRT N=number of molecules n=number of moles It may be my fault i might have put it in that format. So dividing by nm will give 3nrt/NM not what i need, i need to somehow make Mm which is mass per one mole from mole and mass.

Yes ofc, but from there, where next? This is new to me I have never used inequalities in a graph let alone finding and solving question. I hardly even understand the question, it says soultions... suggesting more than one answer.

1 a + b) i still don't understand it mate, I've never seen that equation before, nor is it in the formula sheet, I don't think they would assume you to know that a A level. There must be another way, however even with that equation i can't swing my head around it. 2) I don't think i have...

Your right i said x=2+2y then x=2-2y, but it would matter because I did, Y^2+2y-8=0 and work from that position with the correct symbol. Cheers for the help with the other one aswell. However for the first question you didn't really help and I am still confused P.S sorry about spelling i...

Ive got a few questions id like checking please but i start with the one I got no clue about :S 1)Slove the equation x(x-2)=2-x So i asumme i slove it to zero, x^2-x-2=0 B)Use the solution to part A and the illustrated grapg to write down the solutions of I) X(x-2)<2-x II)X(x-2)>0...

Im don't even know where to start, theses questions, it doesn't seem to link to anything I've learned or any equations. So here we go. 1a) show that about 78,000 J are required to move 28 grams of notrogen molecules (one mole) from the surface of the moon to a point far away from the surface...

ouch some very bad maths sorry, -1/2 *4 = 2 :P there for c=6 :D making what i said ilrelivant

:D thank you for checking them two questions for me. As for the main one, putting into an equation had sliped me, mainly because i don't know how to find the x intecepy from a y=mx+c graph... However i put into equation and got -1/2x +8, so the y intercept is 8. but was unsure from there for...

The main help i need is with this question: The perpendicular bisector of a straight line joining the points (3,2) and (5,6) meets the x-axis at A and the y at B. Prove that the distance AB is equal to 6root5. I just need to have theses checked to make sure there right, would love if you...

First off sorry about the werid title i had put a randm bunch of letters in so i could see if the images had worked on preview. Thanks you so much mate youve helped me understnad it a lot, cheers :)

http://www.ami.ac.uk/courses/topics/0123_mpm/images/met_mpm_imgb.gif http://i859.photobucket.com/albums/ab152/Greener1011/Untitledpicture.png First off I am sorry about the massive size. The top graph is how a stress strain graph of a metal should look. However i can't seem to think why Mpa...

<----- regular fisher :P i know what your on about with the BB:P however don't understand the set up of the needle and how measurements can be made with it.