4 ideas
13083 | The essence is the necessary properties, and the concept includes what is contingent [Leibniz] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
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] |