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Still, in the absence of naked singularities, the universe, as described by the general theory of relativity, is deterministic: [1] it is possible to predict the entire evolution of the universe (possibly excluding some finite regions of space hidden inside event horizons of singularities), knowing only its condition at a certain moment of time ...
The chronology protection conjecture is a hypothesis first proposed by Stephen Hawking that laws of physics beyond those of standard general relativity prevent time travel—even when the latter theory states that it should be possible (such as in scenarios where faster than light travel is allowed).
1953 – P. C. Vaidya Newtonian time in general relativity, Nature, 171, p260. 1954 – Suraj Gupta sketches how to derive the equations of general relativity from quantum field theory for a massless spin-2 particle (the graviton). [122] His procedure was later carried out by Stanley Deser in 1970. [123] [124]
Galilean invariance or Galilean relativity states that the laws of motion are the same in all inertial frames of reference. Galileo Galilei first described this principle in 1632 in his Dialogue Concerning the Two Chief World Systems using the example of a ship travelling at constant velocity, without rocking, on a smooth sea; any observer below the deck would not be able to tell whether the ...
Einstein argued that the general covariance of his theory of gravity supports Mach's principle, which would eliminate any "absolute motion" within general relativity. However, as pointed out by Willem de Sitter in 1916, Mach's principle is not completely fulfilled in general relativity because there exist matter-free solutions of the field ...
He came out saying different lines every single time. When he said, ‘Son of a bitch – he stole my line,’ I grabbed Gus [Van Sant, director] It was like a bolt.” Robin Williams (Getty Images)
In special relativity, Newton's second law does not hold in the form F = ma, but it does if it is expressed as F = d p d t {\displaystyle \mathbf {F} ={\frac {d\mathbf {p} }{dt}}} where p = γ( v ) m 0 v is the momentum as defined above and m 0 is the invariant mass .
The stars of the hit movie “Wicked” have finally addressed their strangest interview moment from a pre-release press tour loaded with awkward viral clips.