Recent content by mat5041

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    Central Force Motion (two-mass orbit problem)

    Homework Statement 1a) Verify that the kinetic energy of two particles can be written as the kinetic energy of a single 'reduced mass' particle with velocity r'equal to their difference. 1b) In the center-o-mass frame, show that theta is the same for r1 as for r, whereas the polar angle for...
  2. M

    Which electron travels from - to +?

    As for your first question, I would guess that it would depend on how the ions/atoms are bonded as to whether or not it is the original electron that travels to the PI. For instance, if the atoms in between NI and PI are conductive, they will have a conduction band of valence electrons that...
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    Problem involving Newtonian Gravity and a tunnel through the Earth

    Homework Statement The problem is: Consider a tunnel that connects any two points A and B on the spherical Earth (assuming constant density). The tunnel is a vacuum, and the train traveling through the tunnel is traveling on a frictionless track with no engine (i.e. it is just falling through...
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