The Best Logique Evidence of God Existence

[polymath257]

A vector has components. So, for example, a vector in two dimensions has an x-component and a y-component. A vector in three dimensions has three components: x,y, and z. A vector in four dimensions has four components: x,y,z, and t.

So, in the energy-momentum 4-vector, the x,y, and z components are the amounts of momentum in the x,y, and z directions. The t component is the energy.

Now, truthfully, if you didn't know what a vector is, you don't have even enough *classical* physics to have a *basic* knowledge of physics, and thereby even a basic understanding of energy. And to have a *modern* view requires a LOT more than just some knowledge of vector calculus.

I am sorry, maybe I wasn't clear.  I went back and reread the post.  I think i got confused with "energy is the Time component of ...".  I thought you were saying that "energy is time", that's what I got confused with.  You were just saying that the fourth vector is an energy vector, not that time is energy.

All I am saying is that scientist do not know what energy is.  They can describe what it does and what happens to it to form particles, but they do not know what it is.  Back to my wife and car.

No, I am saying that the energy of a particle is the fourth piece of a vector, the rest of which describes momentum.

And it is not clear what you mean when you say 'scientists don't know what energy is'. Sure we do. It's the fourth component of the energy-momentum vector.

The problem is that 'what something is' is a metaphysical question and thereby likely to be simply meaningless. Much better is to realize *all* physical concepts are defined operationally: by how we measure them. This is just as true of energy as it is of mass, charge, spin, parity, momentum, angular momentum, etc.

Here's a question. What sort of answer is possible to the question 'what is energy'? Once again, the predictability obtained in science and the detail is far above what your wife does with the car. At some point 'knowing what something is' is the same as 'knowing how it works'.