In classical mechanics, a particle confined to move along only the $x$-direction can be fully described by a 2-tuple $(x_1,p_1)$ in phase space. In this case, the phase-space is clearly 2-dimensional. Similarly, a particle free to move in three spatial directions can be fully defined by a 6-tuple...

As space bends, stretches, and warps when there are massive objects in the vicinity. Which means there will be no warping or bending in space when there's no mass. I am talking about keeping the space-time fabric analogy in mind. Is there any force that helps space to regain its original neutral ...

This question has been asked many times in conjunction with a suddenly disappearing sun. The common reaction to this is that it takes a while for the spacetime curvature to be changed around it. In accordance with special relativity, so it is said. An instantaneous change from curved to flat by m...