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Coulomb- Wechselwirkung
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== Experimentelle Grundtatsachen == * Materie trägt als skalare Eigenschaften Masse und elektrische Ladung '''Masse:''' * Gravitations- Wechselwirkung (Newton: 1643 - 1727) Kraft auf Masse <math>{{m}_{2}}</math> bei <math>{{\bar{r}}_{2}}</math>, ausgeübt von Masse <math>{{m}_{1}}</math> bei <math>{{\bar{r}}_{1}}</math>: :<math>\begin{align} & {{{\bar{F}}}_{g}}^{(2)}=-\gamma \frac{{{m}_{1}}{{m}_{2}}}{{{\left| {{{\bar{r}}}_{1}}-{{{\bar{r}}}_{2}} \right|}^{2}}}{{{\bar{e}}}_{12}} \\ & {{{\bar{e}}}_{12}}:=\frac{{{{\bar{r}}}_{2}}-{{{\bar{r}}}_{1}}}{\left| {{{\bar{r}}}_{1}}-{{{\bar{r}}}_{2}} \right|} \\ \end{align}</math> Wegen: :<math>\gamma ,{{m}_{1}},{{m}_{2}}>0</math> wird dem Phänomen Rechnung getragen, dass Gravitation stets anziehend wirkt. Festlegung von <math>\gamma </math> durch Wahl einer willkürlichen Einheit kg für Masse: :<math>\gamma =6,67\cdot {{10}^{-11}}\frac{N{{m}^{2}}}{k{{g}^{2}}}</math> schwere Masse = träge Masse: :<math>\Rightarrow 1N=1\frac{kg\cdot m}{{{s}^{2}}}</math>
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