Recent content by adimare

I appreciate the response. But I'm not really looking to cut a cake; I'm only interested in the mathematical problem. Yes, cutting a wedge from the middle and putting the two halves together would solve the problem in real life (as stated in the OP), same with your solution of cutting a slice...

Slicing off a sector doesn't seem to be a good approach. No matter what the value of ##N## is, you'll end up with an exposed area of ##2Rh## It's easy to prove there are better approaches. Ie: just doing a single cut of length ##d## like so: Will result in an exposed area of ##dh##. With...

There's a very famous letter to the editor of Nature from 1906 that describes a process to cut a cake in a way that minimizes the exposed area to become dry. The solution is to cut a strip of cake from the middle with tho parallel lines, then put together the remaining chords together in order...

Depends on the reference frame. Let's say you're at rest relative to the emitter when the photon is fired, and then the emitter starts moving in the opposite direction. From your frame of reference, the distance between them will be greater than c x time. From the emitter's frame of reference...

I have two rockets, one in point A and another in point B, I'm going to crash one against the other, twice, and I will be observing safely from my laboratory at C, which is right in the middle between A and B. The first time the experiment takes place, I see both rockets rushing forward to...

I think stillwonder named the group the "relativity buster gang", but I wouldn't know anything about that. It's nothing personal, I'm just starting to learn relativity and since you're already denying it, I'm assuming your understanding of the theory is inmense (you'd be surprised, but...

Oh man, arbol, I hadn't realized you were one of those, I will completely stop paying any attention to your posts from now on :smile:

arbol, I just don't believe the constancy of c can be explained in terms of special relativity (which derives it's predictions based on the postulate of the constancy of c.).

Hear to what Feynman has to say about inertia. That's where we are in terms of relativity as far as I'm concerned. We observe something through experimentation (constancy of speed of light in certain inertial frames), assume it will be true in a broader level (constancy of speed of light in all...

I believe the question "why does c move at constant speed in all reference frames?" has no answer. We have experimented and this is what we have observed, relativity studies the consequences of c being constant in every reference frame (and thus far said consequences have not been debunked...

dx'^2 + 2dt'dx'\beta + dt'^2\beta^2 = 0 a = dt'\beta thus dx'^2 + 2adx' + a^2 = 0 (dx' + a)^2 = 0 dx' + a = 0 dx' = -a dx' = -dt'\beta dx'/dt' = -\beta Thanks everyone, I will proceed and slap myself in the head so you won't have to

I must suck at this, so far I have ( \frac{dt' + dx'\beta} { \sqrt{1-\beta^2}} )^2 = dt'^2-dx'^2 \frac{(dt' + dx'\beta)^2} {1-\beta^2} = dt'^2-dx'^2 (dt' + dx'\beta)^2 = (dt'^2-dx'^2) (1-\beta^2) dt'^2 + 2dt'dx'\beta + dx'^2\beta^2 = dt'^2 - dt'^2\beta^2 -dx'^2...

I'm reading Wheeler's spacetime physics and have been doing some newbie SR problems. I thought up what shouldd be an extremely simple problem but am having trouble with the math, I'm sure one of you guys can probably help me out with it. Events A and B occur with a time separation in the...

The people here probably know better books than the ones I've read, but from layman to layman I'd highly recommend Banesh Hoffmann's "Relativity and its Roots", by far the most comprehensible explanation of special and general relativity I've read so far (wikipedia's articles are great too). I...

The main thing to keep in mind when analyzing this paradox (what has helped me the most, at least) is that although in uniformly moving frames one cannot be preferred over the other, this does not happen in accelerated frames: uniform motion is relative, acceleration is not. Imagine the...