Recent content by Alistair

ok got it. 500 = 80e^0.02t goes to ln 6.25 = t 0.02

i don't know how dividing both sides by 80 will make it easier or alter the answer in any way... i want to know if there is a problem with my working. I am not sure if it is even the right formula...

Yeah i ment k not x. in my maths book in the examples it has x. but it still doesn't work with k in there... :frown:

Homework Statement The number of rabbits in a colony is given by N=80e^(0.02t) where t is in days. c) After how many days will there be 500 rabbits? N=500 A=80 k=0.02 t=? Homework Equations (ln being the exponential logarithm) Q=Ae^kt and possibly the conversion formula: ln y =...

hmmmm. sorry can't help you there. i don't know af any programs that would allow you to do that. sorry. try posting this in the mathematics forum. Auto Cad might be able to help get the picture.

these three shapes on the same graph would look like 3 circles with their centres at the origin on 3 differend planes. we'll start with x^2+y^2=1. this is your normal 2d circle. then super imposed on this is z^2+x^2=1, this is the same shape except it is rotated around the x axis. y^2+z^2=1 is...

Ok I'm under the impression that gravity only effects matter. therefore, because light is effected by black 'holes' it must have some form of matter that it is formed from. Einstein theorized that as an object gets closser to the speed of light, it will take on 'infinite mass'. and going by this...

I would like to point out that "galaxies outside of our observable universe" would be part of another system wouldn't they? and thus do not factor into the conservation of energy law.

It is accepted that the universe is expanding yes? and it is also expanding at a slower rate than the speed of light. therefore what happens when light hits "the edge of the universe"? where does this energy go? and i know that the universe is "everything" but if the universe is 'expanding' then...