What is energy?
There is a fact, or if you wish, a law, governing all natural phenomeno that are know to date. There is no know exception to this law-it is exact so far as we know. The law is called the conservation of energy. It states that there is a certain quantity wich we call energy that does not change in manifold changes which nature undergoes. That is a most abstract idea because it is a mathemathecal principle, it says that there is a numerical quantity which does not change when something happens. It is not a description of a mechanism, or anything concrete, it is just a strange fact that we can calculate some number and when we finish watching nature go trough her tricks and calculate the number again, it is the same.
¨Particle physics is one of the research areas that really tackles (the question of) what is everything around us made of..........people like to learn about that.¨
What is matter energy, space and time?.Best guess seems to be that this is either a heax,