Wednesday, April 10, 2019

electrostatics - Why don't free electrons escape from a conductor?


The thermal velocity of the free electron in a metallic conductor varies from 105 m/s to 106 m/s. In spite of high velocity, free electrons fail to escape from the metallic surface. Why is that?





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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 \...