variable mass in a sentence

Examples

1. He also discussed two other unexplained effects : ( 1 ) non-conservation of mass implied by Lorentz's variable mass \ gamma m, Abraham's theory of variable mass and Kaufmann's experiments on the mass of fast moving electrons and ( 2 ) the non-conservation of energy in the radium experiments of Madame Curie.
2. He also discussed two other unexplained effects : ( 1 ) non-conservation of mass implied by Lorentz's variable mass \ gamma m, Abraham's theory of variable mass and Kaufmann's experiments on the mass of fast moving electrons and ( 2 ) the non-conservation of energy in the radium experiments of Madame Curie.
3. :Black holes have variable mass, whereas all particles of a given type have the same rest mass . ( Then again, " is " the mass of a black hole a rest mass ? ) I suppose every different mass of black hole would be a different " particle ", in a sense, which interacts with other particles by eating them and becoming a higher-order black hole?