The Law of Conservation of Energy

i'm skipping the basics of that, and i'm going to pick it up where she writes. Where does that motion originate? At first sight, it comes from the user who turns the winding key. But if you go a little deeper, this seems to be the start of an infinite e s which has happened repeatedly in this book. The stuff that charges the box is what physicists call energy. It rules miniscule particles such as electrons and protons,. heat engines that propel aircrafts and spaceships and the mitocondria powering ourselves.