JaKiri

That's not what you said, though.

I've no idea what you're trying to say. No metal, or metal alloy, is a crystal. Almost all of the properties exist because of the sea of free electrons, and the only reason that alloys have slightly different properties is that the different sized atoms don't fit into the matrix as well, which would be immaterial if they were a crystal anyway.

Tetrahedral, technically. AKA a D4.

Spherical die. And I've seen them before.

Metals aren't crystals, and it's ALL to do with the electronic configuration.

To generalise, normal dice are always regular solids.

However, you can make it by reacting a sulpher compound, to produce the element.

Oh, and don't forget that normal dice are rectangular prisms too.

The reason IS that c is constant relative to every observer.

If you didn't know what day it was, it would be impossible to find out without reference to a piece of information about the day (eg. what day it was THEN). The 'day of the week' is just an artificial construct, reasonably unlike 'time of day'

You only observe velocities from your own rest frame.

No.

Hold on, do you mean what time of day, or what day?

Lightspeed is the same to all observers. All rest frames are equally valid. Look at it this way; when you're going at 30mph, what are you doing it relative to? The planet. However, it's equally valid to say that the planet is going 30mph with you at rest (assuming no acceleration occurs). Another way of looking at it is... You're in space. You think you're stationary, yes? Then some other guy drifts past you. To HIM, it feels like he is stationary, and you are drifting past HIM.

They're things that are going faster than the speed of light (conjecturally). They're the same as 'non'lightspeed particles in the sense that they can never reach the speed of light (although for them it would mean slowing down), and cannot go sublight speeds, just as we can't go superlight speeds.

So can ANYTHING that isn't going at the speed of light though (excluding tachyons of course, but that's approaching the problem from the other direction)

Nope. It'll go away from you at lightspeed.

Whereever you are, whatever speed you're going at, the speed of light in a vacuum will still be 299792458ms^-1

I did. And I don't get royalties either, bastards.

Electricity doesn't. That's an electron flow, and electrons aren't an exchange particle. Plus, they have mass. Only massless particles can travel at c. The ones that can are types of particle called Bosons. The most common ones in every day life would be the photon (light, which is the exchange for the electromagnetic force) and the graviton (only the subject of conjecture at the moment).

Damn thing

I don't think you'd get any vitamin c from any kind of crisp.

Relative to anything possible ever. Even if you 'were' a light beam, light going the other way would still be going off at the speed of light. And as to, the train and the man it's called a relativistic effect. It's a consquence of the thing about the speed of light.

Well, you wouldn't. I sometimes don't know what day it is without losing my memory.

ALL observers. You shine a torch at me, you'll see the light going at c (if it's a vacuum). If I'm running away, I'll see the light going past me at c. And you're actually incorrect about the man on the train. He's actually going ever so slightly less than 30MPH. The equation for adding velocities isn't a + b = velocity, it's (a+b)/(1+ab/c^2)