Friday, April 1, 2016

particle physics - What is the smallest observable structure in the universe?


I've been wondering about the Planck length recently, but it is not observable. What is the smallest actually observable structure in the universe?




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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 \...