Category Archives: Diary

Personal diary to reflect on thoughts

The rubber sheet gets the geometry right and the mechanism wrong!

You have seen this demonstration. Somebody stretches a rubber sheet over a frame, drops a bowling ball in the middle, and the sheet sags. Then they roll a marble across it and the marble curves toward the bowling ball, maybe … Continue reading

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A Scientist Before “Scientist”

Mary Somerville is so difficult to put into words that it’s funny. To be honest, who was she? Although you would be correct in calling her a mathematician, you would then be required to clarify the astronomy. The word “astronomer” … Continue reading

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On physics, visibility, and why I stayed

I remember being in high school and telling people I wanted to study physics. The response was almost always the same. Not discouragement exactly, more like mild concern, the kind adults give you when they think you are about to … Continue reading

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Aristotle on Motion

Aristotle divided motion into two classes: natural motion and violent motion. These ideas are not really part of modern physics anymore, but they are important because they were among the first serious attempts to explain motion logically rather than through … Continue reading

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