Exact solutions in general relativity
In general relativity, the van Stockum dust is an exact solution of the Einstein field equation in which the gravitational field is generated by dust rotating about an axis of cylindrical symmetry. Since the density of the dust is increasing with distance from this axis, the solution is rather artificial, but as one of the simplest known solutions in general relativity, it stands as a pedagogically important example. This solution is named after Willem Jacob van Stockum, who rediscovered it in 1937 independently of a much earlier discovery by Cornelius Lanczos in 1924. It is currently recommended that the solution be referred to as the Lanczos–van Stockum dust. (Wikipedia).
How to Make/Build a Van de Graaff Generator Part 1 (Homemade/DIY)
Step-by-step description of making a Van de Graaff generator built using parts from around the house such as a Coke can and rubber bands. I also show how to test it using an electroscope. For Part 2 of How to Make a Van de Graaff Generator, including more getting 20% better performance, r
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How to Make a Van de Graaff Generator Part 2
Details on how to make a Van de Graaff generator. This part improves on the Van de Graaff made in part 1, showing how to make a better dome, out of a soda can, for 20% better performance, many options for grounding the brush near the motor, different materials for making rollers including
From playlist Van de Graaff Generators
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From playlist Tales from the Periodic Table
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From playlist Teach physics with fun! (video games, sci-fi, etc...)
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Van de Graaff generator experiment to test the faraday cage effect of the Van de Graaff dome. In my first How to Make a Van de Graaff Generator video I didn't put the whole top part of the VDG inside the dome, as is normally done. Instead I just ran the wire from the brush into the dome. A
From playlist Van de Graaff Generators
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