User:Pervect/Example/Sandbox

The concept of mass probably has its earliest origins as being "the quantity which a balance measures". (quote needed). Newton defines mass as "the quantity of matter" in his Principia. However, this defintion was soon regarded as inadequate. Even today, some authors, such as Eugene Hecht, argue that
 * circles in the sky
 * does mass really depend on velocity, dad?
 * thin shells at c
 * born rigidity
 * in defense of relativistic mass
 * relativistic generalizations of mass
 * on the concept of energy in classical relativistic physics
 * okun - the concept of mass (soviet)
 * okun the concept of mass
 * there is no really good defintion of mass
 * concepts of mass in contemporary physics and philosophy
 * Jammer concepts of mass, contempary
 * Jammer concepts of mass, classical
 * Schild clock paradox
 * SR in acclerated systems
 * grav field massless particle
 * billiard balls in closed spacetimes
 * inner structure black holes Poisson & Israel 1990
 * Poisson & Israel mass inflation 1989
 * inner structure black holes ori 1991
 * inner structure black hole ori 1992
 * radiation accelerated charge
 * Eschatology of the black hole interior
 * the four laws of black hole mechanics
 * topology of the universe
 * Gamba


 * "There is no really good defintion of mass"

The problem is not that there is a lack of defnition of the term - rather, there are too many defintions, each slightly different.