Recent content by sydfremmer

Thanks again :) Now I can sleep

A related topic that I have a difficulty understand is the expansion of the universy. I read that the universe is expanding such that some galaxies move away from each other faster than the speed of light. If this is the case, does it not mean that some galaxies are moving away from us faster...

New question: Will the light from p1 ever reach p2?

Thank you, But what do you mean by "water vacuum"?

Thank you all for the replies. I feel that i understand the basic concept now. By the way, can anyone recommend a good introductory physics book explaining time dilation and related topics

Thank you for the reply. A very basic question. Can you explain in details why bubles of smoked are sucked through the water? What are the forces causing this to happen?

Just to be clear. Is it correct to say that the distance between them is growing faster then the speed of light?

Thank you for the reply. I need to describe how hard to suck on the hose, in order to start bubles of smoke flowing through the water. What are the basic principles behind that mechanism?

OK, so in effect the particles ARE moving away from each other with speed greater than light?

Dear Forum Users, Please look at this diagram: http://kronicunderground.com/wp-content/uploads/2011/07/hookah-diagram-1275695035.png I know that when you suck in on the hose you create a pressure difference which pushes the air from one end, through the water, and into your mouth/lungs...

Dear Forum Users, I am a graduate student in Mathematics and not physics, so please bare with me. Also, I know that a similar topic has been discussed before but i could not get a clear answer from reading the previous posts. And here is the question i have been wondering about...