fermi problem

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Size of 91,000 documents

Here is a quick one. One of the big news stories recently was this regarding WikiLeaks and the release of the Afghan War Diary. There could be tons of things to discuss regarding this – but I am not going to do that. The first thing that struck my mind was “over 91,000 documents”. That…

You thought I was going to talk about a problem that math teachers could use, didn’t you? Well, maybe math teachers can use this. (note: when I say “teachers” I really mean “learning facilitators”) It all started when I read this valedictorian speech from Erica Goldson. Here is part of it: “I am now accomplishing…

Could cars slow down the Earth?

Time for another Fermi problem. There was a recent story in Science News that talked about the effects of the Chilean quakes on the Earth’s rotation. The basic idea is that some ginmourmous amounts of rock moved closer to the Earth’s center. Since the angular momentum of the Earth is conserved, the angular rotation rate…

There was a Buzz Out Loud episode in the not-to-distant past where the discussion of youtube came up. I can’t remember the exact details, but the main point was that it would be impossible for google (the owners of youtube) to review all of the videos that were submitted. And here is my calculation. How…

I haven’t seen the Pixar Movie “Up” yet, so don’t spoil it for me. I have, however, seen the trailer. In my usual fashion, I have to find something to complain about. There is this scene where the old man releases balloons out of the house. What is wrong with this scene? Also, would that…