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  • 36 votes cast
Feb
4
comment Is time fundamentally different from space?
"you can in principle move freely forward and backward, while in time, your motion is fixed" -- But is that a characteristic of the dimension, or a limitation of our technology and/ or dimensional nature? Afaik, there's no evidence that time travel in the past is impossible, so there's nothing that can be said for certain about that for now.
Feb
4
revised Is time fundamentally different from space?
added 13 characters in body
Feb
4
asked Is time fundamentally different from space?
Feb
4
accepted What does it mean for objects to follow the curvature of space?
Jan
27
accepted What exactly is a mole?
Jan
27
accepted How do formulas get figured out?
Jan
27
accepted Normal force: up or down?
Jan
27
asked What does it mean for objects to follow the curvature of space?
Jan
27
awarded  Scholar
Jan
27
accepted What is wrong in this representation of relative reference systems?
Jan
2
revised What is wrong in this representation of relative reference systems?
edited title
Jan
1
asked What is wrong in this representation of relative reference systems?
Nov
28
comment What are some scenarios where FTL information transfer would violate causality?
@JustinL. A way you could think about this is perceiving a 2D plane (a paper) from different angles in 3D; if 'all is right', your perception will distort, but you'll never see an impossible shape. The same way with perceiving a 3D body in 4D; depending on how you move in 4D, your perception of the 3D body might change, but you shouldn't ever see something that is impossible.
Nov
28
revised Formation of black holes
edited body
Nov
27
awarded  Teacher
Nov
27
awarded  Critic
Nov
27
answered Formation of black holes
Nov
27
asked How do formulas get figured out?
Sep
23
asked Normal force: up or down?
Sep
22
awarded  Editor