The Physics
Opus in profectus


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  1. Write something.
  2. Write something.
  3. Write something.
  4. Write something completely different.


  1. Two small, lightweight, pivoting magnets are placed near one another with their north poles facing inward as shown in the diagram below. What final arrangement will these two magnets have?

  2. Using a very strong magnet, it is possible to pull the iron out of a fortified breakfast cereal. It is not possible to do this to the iron in your blood. (I don't care what you saw Magneto do in that X-Men movie, it can't be done.) Why is this? How is the iron in breakfast cereal different from the iron in human blood?