Comment on Which is it Lemmy?
Bytemeister@lemmy.world 3 days agoThe cube doesn’t interact with the piston, but it does interact with the portal and the portal is fixed to the piston.
The portal isn’t an object, the cube doesn’t interact with it either. Saying you interact with the portal is the same as saying the hole in a lasso is an object that you interact with.
Duamerthrax@lemmy.world 3 days ago
If the portal is being pushed down by the piston, that means it interacts with piston. A portal isn’t a lasso because lasso’s exist and have known rules to them. The only things we can know about portals is what’s presented in the hypothetical.
Bytemeister@lemmy.world 3 days ago
Sure, because the portal is affixed to the piston, but you should note that the portal is not affixed to the box. The box doesn’t interact with the piston, or the portal, in the same way it doesn’t interact with a hoola-hoop that is passed around it.
Duamerthrax@lemmy.world 3 days ago
If the box enters the portal at a certain rate, it has to exit the portal at the same rate. Unless there’s relatively involved, that has to be true and everything else follows.
How is the portal affixed to the piston? Whatever made up system that affixes the portal to the piston would also allow it to interact with the box.
The box has to exit at the same rate it enters and the law of conservation of mass and energy dictates that no new energy is created and it has to come from somewhere. If there is no way for the energy to be transferred from the portal to the box, then simply, portals cannot exist.
Bytemeister@lemmy.world 3 days ago
It’s doesn’t matter really, this is a red herring.
There is the problem with your logic. The box doesnt move, there is a shortcut in space that moves around it.
EXACTLY!! A is the only scenario where energy (or more accurately, momentum) is conserved in this case. If you want to think about why that is, see my previous post where I extrapolated on a case where a lighter object with a portal on it is moved over the box.