Recent content by Psip

Here is the video: [link deleted by moderators] His basic idea is to take the spacetime interval and add a 5th term for the 5th dimension he is describing so it looks like: $$\Delta S^2 = c^2\Delta t^2 + c^2\Delta w^2 - \Delta x^2 - \Delta y^2 - \Delta z^2 $$ where w is the difference in time...

Thanks for the replies. I got an answer from somewhere else and apparently total energy would be E=mc^2-GMm/r+1/2mv^2 so when particles come in from far away they will have positive energy. So things really need to be made on the edge of the event horizon. However, would the star junk near the...

In hawking radiation a black hole decreases in mass and is described by E= mc^2-GMm/r and as r gets closer to zero the energy of the particle that enters becomes negative and takes away from the net energy of the black hole. My question is why does this only apply to these particles that pop out...

But how do I know that the total displacement is the addition of the two displacements because the 2 sides of a triangle added should be longer than the longest side which is why I'm confused. Edit: I understand now because the displacement vectors are added which gives total displacement

Yes that's what I mean I just didn't know how to put the vector arrow above the letters but yes they are all vectors. I just don't know how to prove the equation you listed based on a picture of the before and after of the point. You can make a displacement vector from the point to the same...

Homework Statement So I have to prove that the total velocity of a particle on a wheel is Vcm+Ui=Vi where Ui is the particles velocity if the wheel's center of mass wasn't moving so just v=omega*R I'm assuming and Vcm is the velocity of the center of mass and Vi is the total velocity of the...

Thank you for your reply, that does make sense that Power isn't applied in a direction. So the answer is -5W

Homework Statement An object moving with a velocity whose components are [4m/s,-1m/s,3m/s] is acted on by a force whose components are [-5N,0,+5N]. What is the power of the energy transfer involved in this interaction? Homework Equations Power=F*v The Attempt at a Solution 4m/s*-5N= -20W...

Ah yes I see thanks for your help the actual problem was that when I did 10000/100 it gives 100 but I thought that I didn't hit the button because it looks like the 100 never changed so it was a weird mistake on my part.

Thanks for the reply but I tried that and I still get the wrong answer

Homework Statement The density of water is given to be 1000kg/m^3 use unit conversion to show a cube of water with a side length of 10cm has a mass of 1kg. Homework Equations mass=volume x density The Attempt at a Solution 1000kg/m^3*1000cm^3*1m/100cm*1m/100cm*1m/100cm=.01kg all meters and...

Sorry I took some time to reply to this forum but I was at school. I didn't expect to get this many responses and I want to thank everyone that replied to me. I was originally going to do my paper on something easier but my english teacher absolutely insisted that I do it on something that would...

I'm not sure where to post this but it is technically homework but it doesn't follow the template and its less of a math question and more of a conceptual thing anyways. I have to write an English paper on a problem in a future career and it has to be big. I'm thinking about physics so I wanted...