mScientist

How can I know what kind of gas I have in a closed jar? Is there any experiments I can do to know what kind of gas I have? thanks.

I can solve this easily if it was 2D (only x and y). 2D Linear equation would be : y = k*x + m and k = (y2 - y1) / (x2 - x1) m = y - k*x But I don't know how to deal with if it was 3D with (x,y,z). Do you know how? thanks

Hi, I have two points in 3D space: point A: (1,2,3) point B: (4,7,6) I want to find a third point between the two, where z = 5 So, point C: (x,y,5) How can I calculate x and y for point C. Thanks.

Thanks for the reply, but my idea was not to send the robot to other stars, or make life or something. I was thinking, like here on earth. If we achieve this we could then copy physical computers and have things like physical upgrade over the internet possible. And computers will cost like only 0.1$ . And this will open the possibly for anyone even in some of the poor countries in south africa and others to use computer and the internet and learn from other countries and develop.

Is it possible to design a machine that can replicate it's self if we give it the materials it needs? I'm thinking like robot that is programed to build replica of it's self. or even like printer that print it's self. Did any body accomplish any thing like this before? If not, do you think that it could possibly be done. If not, are there any law's of physics that prevent this. (do cells do this?) I couldn't find any good results on Google.