4 ideas
9284 | Reasons are 'internal' if they give a person a motive to act, but 'external' otherwise [Williams,B] |
16591 | Prime matter is nothing but its parts [Vanini] |
20646 | Helmholtz used 'energy' to mathematically link heat, light, electricity and magnetism [Helmholtz, by Watson] |
20973 | All forces conserve the sum of kinetic and potential energy [Helmholtz, by Papineau] |