Tuesday, March 28, 2017

thermodynamics - Is everything 100% efficient at heating?



Everyone always talks about the efficiency of their appliances. I was wondering if everything was 100% efficient at heating its surroundings ?




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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 \...