Recent content by Svensken

Homework Statement For what integers is x^2-2x-3 divisible by 8. give answer x = a list of natural numbers (mod 8) Homework Equations The Attempt at a Solution I thought x(x-2) = 3 (mod 8) and tried to find all values that satisfied this. But got really stuck. I also tried...

Homework Statement Hello! I am stuck, having wondered about this question for quite some time now and I am not too sure how to solve it Denote the xy-plane by P. Let C be some general curve in P defined by the equation f(x,y) = 0, where f(x,y) is some algebraic expression involving x...

Hello, yes that is very true - didnt think of that. Thanks anyways

Hello! I am currently looking for a fractal program for my mac, preferably with free download :) I want to be able to draw a pattern and the program compares this to a fractal that it can generate (hope that makes sense). I mean that instead of entering the complex number in say a julia set...

Complex number question (i think :) ) Homework Statement Solve the following equations in C : (a) z^2 + 3z + 2 = 0 The Attempt at a Solution I thought i should solve the quadratic for z, (z+1)(z+2)=0 and then somehow say that: 1=x+iy I don't really understand how to go...

Dear Marcus Thank you for your great response, it cleared a lot of thing up for me (for now at least:biggrin:) I now understand what is meant by the cosmological principle somewhat! From what you say it has been the most successful assumption upon which most data has been explained...

Hi As far a i understood the question. 1. You think of a flat and infinite universe, which is a good candidate at the moment. 2. You wonder if there can be matter everywhere in this infinite flat universe. I have been thinking about this too, if there is matter spread out everywhere in...

As with everything within hacking: - You can hack system "X" if there is a hole that allows system "X" to be hacked. - Since we are humans, system "X" will almost always be open to a dedicated hacker (pref: "cracker"). - We can protect system "X" but we need to be ahead of the game.

Hey! If you fire a gun standing still the bullet will travel at a certain velocity. If you fire a gun sitting in an airplane, the bullet's velocity will be speed of plane plus the the velocity due to the gun. If you fire a bullet with a light being emitted from it: will the velocity of...

Parallel meaning moving down the plane? Thanks mate!

i was thinking: mgh turns into 1/2 mv^2 (i am neglecting friction) rearranging gives v = sqroot(2gh) Since g is equal to acceleration due to gravity it becomes g =a*sin(angle) Is this correct?

Homework Statement How is angle of incline related to the acceleration of the car moving down it? I know how to find both the velocity and acceleration of a car moving down a track using the suvat equations. I don't understand the relationship between angle of incline, velocity and...

Thank you, i will do so!

Well thank you. However i cannot simply use a formula us such. I wish to derive it using for example, a stopwatch. Any ideas? Thanks again

Homework Statement Hello! I was thinking about designing an experiment in which i would investigate the angle of incline of a surface and the acceleration of a toy car moving down it. I will most likely be using a stopwatch. My question is: How should i go about calculating the...