Physics

How to convert from from km/h to m/s?

Atheists, how do you *KNOW* time didn't exist before the big bang?

Why dont airplanes wings not flap to fly?

Does everything have boundaries?

Why do atheists have such faith in the belief that there was nothing before the big bang?

History of universe?

... is it possible that matter and energy have always existed ... ?? Maybe in a higher dimension like god is depicted to in the Christian bible ... if so than this higher plane of existence could be t

What created the Big Bang?

Dont tell me God because we all know that is bullshit.

Does any believe in parallel universes or Multiverses?

What is the possibility of the big bang?

I heard it was zero, correct me

Does electromagnetic field have energy?

is this true moving EM FILED IS CALLED EM radiation?

What is the tension in the rope of the figure(Figure 1) ? Assume that m = 68kg .?

Figure 1 Link. the figure looks like that but the left weight is 68kg and the right weight is 100kg. http://www.physics247.com/physics-homework-help/forcesb.jpg I got 790N but Mastering Physics says

What caused the Big Bang, was it God?

If it wasnt, what caused it?

A question about laser light?

How do you make laser light different temperatures? I know the ones that scan in the grocery stores, and the ones that point at walls. I saw a kid today make a laser out of a flashlight where it burne

If our brains use quantum effects to operate is it impossible for us to develop a theory of everything?

I understand that it is quite widely suggested that our thinking process is the result of quantum strangeness. If this is so, are we naive in thinking that we are ever capable of fully understanding q

What is the expanding universe expanding into?

With little doubt, the universe is expanding in all direction (seen via the Doppler Effect, etc., quantifiable, reliable and verifiable) and has been since the Big Bang. What is it expanding into? H