The energy is in all the side. In the nature it is in cascades, in the rivers, the wind, the sun and the animals. For example, the foods that we eat changed into energy we to be able to study, to play, to run, to think, at last, for everything what we make in day-by-day. […]
Of the constant relations between phenomena, we can formulate mathematical laws and equations natural. For example., a mathematical theorem as ' ' the surface of the sphere is the quadruple of the surface of a circle mximo' '. In the geometric Optics, always ' ' reflection factor will be the reason between the reflected luminous […]