4 ideas
15833 | Tell cleverness from answers, but wisdom from questions [Mahfouz] |
10801 | Either reference really matters, or we don't need to replace it with substitutions [Quine] |
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] |