(July 23, 2019 at 1:34 pm)polymath257 Wrote:(July 23, 2019 at 12:44 pm)comet Wrote: You also mentioned "energy is the Time component of ..." , whats that mean? energy is the time component?
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.
anti-logical Fallacies of Ambiguity