11. The electron itself, as far as anyone knows, is a point charge / point mass . 12. This is a measure on the real line, a " point mass " at 0. 13. In the limit, as the component point masses become " infinitely small ", this entails bodies. 14. However unlike point particles, point mass can only apply to an object that is infinitely small. 15. This limit emphasizes that any point mass located at is entirely captured by the Laplace transform. 16. This limit emphasizes that any point mass located at 0 is entirely captured by the Laplace transform. 17. I would not have believed that the strict treatment of the point mass problem was so simple, 18. :The Earth's gravity resembles that of a point mass " if you're not inside the Earth ". 19. Cartesian and Newtonian physicists argued that in their collisions, point masses conserved both momentum and relative velocity. 20. Another kind of directed distance is that between two different particles or point masses at a given time.
