Where did energy come from?

Answer 1

In the fundamental sense, energy is a property of matter, Einstein showed how mass and energy are related by the equation E = mc2. Nuclear energy arises because in fusion of light elements or in fission of heavy ones, mass is lost and energy released. The loss of mass is a function of the way the components (nucleons) of the nucleus stick together, this is called the nuclear binding energy.

As the universe developed after the big bang, stars formed from accumulated matter and fusion reactions started. The sun is one such star, and its energy reaching the earth made life start and eventually formed all the coal and gas and oil, which we can now exploit and obtain the locked up energy from. Formation of uranium which is another source of energy also followed from some sort of stellar event such as a supernova somewhere in the universe, billions of years ago.

So everyting starts from the basic laws of physics which determine how the components of the nucleus behave together.

Answer 2

Sounds like the answer is the sun... plants take this energy from the sun through the process of photosynthesis and other heterotrophs, such as mice or rabbits, eat them and use them as food, until something else eats them, the start of a food chain!

Answer 3

All the energy that exists today was already available at the time of the Big Bang. In a way, there was more energy at that time: part of the energy has already been converted to useless energy (total energy is conserved, but usable energy gets less over time). It is not known what caused the Big Bang, or what was before the Big Bang - or if a term like "before" even makes sense in this case.

Answer 4

Energy originated during the Big Bang, the event that initiated the expansion of the universe. The energy in the universe has been constantly transforming from one form to another, driving various processes such as movement, heat, and chemical reactions. Ultimately, all forms of energy are interconnected and stem from the fundamental laws of physics.

Answer 5

Energy comes from the sun