On the real world, or is it just a theoretical concept created by humans to facilitate on understanding and calculations?
I was discussing this the other day, and it seemed that we couldn’t say an object had energy, but were in some states that we call energized. For instance a moving object doesn’t have something on it that we can call energy, the only thing it has is movement. So we introduced the concept that Ec = (1/2)m * v^2, but in fact the energy it has is nothing more than a theoretical concept used to express the idea.
When water is getting heat by a flame, we could say there’s an energy transference between the gas (hotter) and the water (colder). In fact there’s nothing going anywhere, what’s happening is particles with different speeds shocking (gas particles shocking with the particles of the metal of the pot which in turn shock with the water’s). Nothing, besides the theoretical energy concept, is being transferred.
What do you think about this?