Tuesday, July 21, 2015

cosmology - Can Hubble red shift be interpreted as time dilation?


Can we interpret the de Sitter universe as a spherical cosmic horizon null surface of finite radius, centered at Earth, and containing the Hubble volume of space where time is dilated and radial dimensions contract closer to the edge in such a way that objects closer to the edge do not recognize that they are radially contracted?


Everything is attracted to the edge, but the total radius remains more or less constant and emits de Sitter radiation at finite temperature.


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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...