6 ideas
16541 | All the intrinsic properties of a thing should be deducible from its definition [Spinoza] |
13073 | To understand the properties we must know the essence, as with a circle [Spinoza] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
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] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |