Recent content by phoenix5002

I'm not sure if this is correct but here goes: Since the picture is stationary then the total upward force must equal 10.0N. Because the center of mass is in the middle and the distance to each cord is equal, we can assume that the upward force in each cord must equal 5.00N. Therefore the...

If you can't find it, you can test it yourself. There are probably many different methods of doing so, you can probably find some online. The easiest would require a spring scale but if you don't have one you can find another method.

I think this is right: V=Vo+(G-KV)T = Vo+TG-TKV V-Vo=TG-TKV V-Vo+TKV=TG V+TKV=TG+Vo V(1+TK)=TG+Vo V=(TG+Vo)/(1+TK)[EDIT]oops, looks like learningphysics beat me to it.

For my university english class I am required to write about an interview I find online. So, I thought I could make this more interesting by writing about an interview related to my major(physics). So if someone would be kind enough to give me a link to an interesting interview of someone in...

There would be no light outside the cone if the image was rendered with no additional lights. However I still understand basically what your asking, although that image doesn't illustrate it. For another example, if you were to shine light through a tiny hole and no other light got out, the...

I must dissagree with saying that acceleration is not understood. I'm pretty sure I have a very firm understanding of acceleration. Also, I do believe that NASA uses a lot of special/general relativity to guide it's ships and sattelites. Sorry to argue over small things irrelevant of the...

You could always try saying "An inertial reference frame is one that does not accelerate relative to another reference frame". However I believe that einstein proved that even in acceleration you can still be in a reference frame. A better definition of a reference frame is "All observers...

I'm confused about the 6 extra curled up dimensions in that they are always portrayed like this: http://people.cs.uchicago.edu/~mbw/astro18200/calabi-yau-grid-small.jpg" But according to that picture it seems there are multiple "extra" dimensions, and that if you move to a different location...

Energy would be described as an intrinsic property. Just like mass. Can you describe what mass is without using it in the definition? This goes for energy as well. However, you asked how does energy get transfered, and the answer is through virtual photons. Imagine 2 electrons moving toward...

I'm didn't mean close to the screen, I meant put the lamp right next to your head, and then look at its reflection off the TV.

Maybe the light is being refracted. Are you shining the light at an angle? Try putting your head as close as possible to the lamp and see if the reflection is still red.

Ok, I have a pretty good Idea of what I'm getting myself into. I didn't expect that I needed quite so much to learn string theory, but I'm not put off by it. Going through all that other stuff is actually a plus, and even though some of it I may have to hear again at college, I think it would...

What exactly is "vector" calculus. I've taken pre calculus and AP calculus courses. Is vector calculus concerned with derivatives and integrals to find slope and inflection points? Because if it is then we have gone over a lot of that. If not then I will start there. If yes then I will look...

Well I have a grasp on relativity, not only was it well explained in "The elegant Universe", but I have done a lot of reading on it. online as well as in 2 different physics books that derive the relativity equations. My brother is currently majoring in physics in college for the second year...

Hello, I have read Brian Greene's book "The Elegant Universe" as well as a few other books and I have a fairly decent understanding of the Concepts of string theory, and I would like to start learning the actual physics and math behind it. Could someone please point me in the right...