My question has a silly formulation, but I want to know if there is some sensible physical question buried in it:
- Suppose an exact copy of our Universe is made, but where spatial distances and sizes are twice as large relative to ours. Would this universe evolve and function just as ours?
Since mass is proportional to volume which is distance cubed, but strength of a rope is only distance squared, I think not everything would scale proportionally.
Does this mean that a universe with our physical laws that evolves like ours can only have one particular size?
Or would the physical laws scale proportionally so that it evolves in the same way?
If it has a particular size, what is it relative to?
Another variation: suppose another exact copy of our Universe is made, but where everything happened twice as fast relative to ours. Would it evolve in the same way as ours?