Category Archives: math

Gyroscopic precession

There have been some interesting things on the interwebs, lately, about rotation, gyroscopes, precession, and helicoptors (all of it brought to my attention, or literally done by, Derek Muller of Veritasium fame). It got me thinking about the modeling I’ve done … Continue reading

Posted in fun, math, mathematica, physics, teaching | 9 Comments

Turntable spriograph modeling

I was inspired this weekend by this video by Robert Howsare: I’ve seen things like this before and I wanted to explore how to model this in Mathematica. It was fun to explore and it really drove home some ideas … Continue reading

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More brute force probability

Last night a tweep of mine posted this: http://twitter.com/#!/r_w_wright/status/109368981281976322 I thought about it for a while with factorials running through my head but, as more people were commenting that it’s not trivial, I thought I’d try a brute force approach … Continue reading

Posted in fun, math, mathematica, twitter | 14 Comments

Linear dielectrics (recursion approach)

I’ve been prepping for my fall course, Advanced Electricity and Magnetism for juniors and seniors, taught out of Griffiths great book. One of the topics that I want to deal with better this time around is electrostatics in materials (chapter … Continue reading

Posted in math, mathematica, physics | Tagged | 5 Comments

When not to cancel common factors

Today I was helping some students of mine get ready for my final. These are science teachers who are in an alternative licensure program for physics. We were talking about the equations for the resonant frequencies in various systems and … Continue reading

Posted in math, physics, teaching | 6 Comments

Brownie nuts probability

I don’t like nuts. I really don’t like them in brownies. What I want is a way to tell if a particular brownie has nuts in it just by looking at it. That’s what this post is all about. If … Continue reading

Posted in fun, math, physics | 2 Comments

Brute force probability

Earlier this week, a twitter bud of mine posted the following (WordPress is supposed to embed the tweet on the next line but it’s not working right now – let me know if you know why and I’ll fix it): … Continue reading

Posted in math, mathematica, twitter | 4 Comments

Wave Pendulum Analysis

Thanks to both Frank Noschese and John Burk, I’ve been reminded recently of the very cool wave pendulum demonstration apparatus: What I wanted to figure out was how the inherent nonlinearities in pendula would affect the analysis of the motion. … Continue reading

Posted in math, mathematica, physics | 20 Comments

>leaf update

>It appears that one lawn bag holds between 40,000 and 50,000 leaves. The boys have renegotiated for $1/bag from now on. They’re not dumb, those two. here’s the description of the project

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>Leaf math

> The leaves have definitely fallen and I’m going to have my kids do some counting for money. I figure $1 for every 100,000 leaves should do the trick. Of course, it only counts if they get the leaves in … Continue reading

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