Sunday, January 20, 2019

quantum mechanics - How do we know what happened during the Planck epoch era of the big bang?


The Cosmic Microwave Background provides the left over radiation of the big bang. Cosmologists have theorised what happened at the Planck epoch era of the big bang.


Where is the evidence of what happened during the Planck epoch era of the big bang?





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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 \...