Posts Tagged ‘estimation’

This was on my ‘to do’ list, but Tom at Swans on Tea beat me to it. Basically, this grocery store has these plates that when depressed produce electrical energy. Tom does a good job pointing out that this is not free energy (the original article says this also). Clearly, the energy comes from the cars. How much would this cost the cars?

Tuesday, June 23rd, 2009 at 21:54 | 7 comments
Categories: physics

So, analysis of the movie Up is pretty popular in the blogosphere. Figure I might as well surf the popularity wave. So, I have a couple more questions.

The most important thing to estimate is the mass of the house. I am going to completely ignore the buoyancy of the house. I [...]

Wednesday, June 10th, 2009 at 02:53 | 10 comments
Categories: physics

The other problem with that scene is the sheer amount of junk in orbit. Suppose that was 300 km above the surface of the Earth (the orbital distance of the space shuttle). What is the volume of of this space (say it is 100 meters thick – which is tiny).

Thursday, February 12th, 2009 at 13:39 | Comments Off
Categories: physics
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