Recent content by darlmc

litewave, Since your simple expanding universe contains two particles with some amount of kinetic energy it is my opinion that its energy content would not be zero. As the simple universe expands its volume increases, its pressure drops and its temperature decreases… but its total energy...

litewave, I like your two particle simple universe and would like to comment on it... To overcome their mutual gravitational attraction your simple universe should be loaded with some initial energy to get the particles moving apart (increasing r). This kick need not change their mass however...