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  1. S

    Time in different dimension

    Is ten minute for an observer in different dimension, with the same speed relatively, same for every observer?
  2. S

    Black hole gravity

    Thank you kirovman, but......g=k/r, what does k and r represent? (Sorry, I am just a secondary school student)
  3. S

    Black hole gravity

    How is gravity affected by the interaction of the particles?
  4. S

    Black hole gravity

    Are mass and distance the only factor to affect gravity? When star become a black hole, the mass remain the same, but the gravity of the black hole is certainly stronger than star. Why?
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