Top products from r/physicsgifs

If you mean near the anode of the battery between the two humps of wire, I don't think so. Looks like the reflection on the hump whizzing by the camera real fast. However, in an inductive load like a motor, if not handled, you can expect to see sparks when the circuit is broken.

See:

• http://www.artisancontrols.com/UtilityImages/ProductSupportPdf/16.pdf
  
  
• http://en.wikipedia.org/wiki/Flyback_diode
  
  As for material for your son, I have a couple things I always recommend to people when they ask. (I volunteered at a local science museum where I live. Got this question a lot.)
  
  An accessible medium is video. There are many, many fantastic shows around for kids interested in science:
  
  
• Magic School Bus
  
• Bill Nye the Science Guy
  
• Beakman's World
  
• Mr. Wizard's World
  
• Cosmos - Which just started up anew!
  
• NOVA
  
• Newton's Apple
  
  Most of those can be found on YouTube!
  
  Then there are more books than you could possible imagine. Even just on Amazon's top selling lists! Here are some that I remember growing up with (maybe I'm biased towards electromagnetism as a studying electrical engineer):
  
  
• You Can with Beakman
  
• Engineering for Every Kid
  
• Leonardo da Vinci Do it Yourself
  
• Make: Electronics (Which is fantastic for electronics!)
  
  And, just because I'm on a roll here, I'm subscribed to a bunch of channels on YouTube centred on science:
  
  
• ASAP Science
  
• Engineer Guy
  
• It's Okay to be Smart
  
• Minute Earth
  
• Minute Physics
  
• Numberphile
  
• Periodic Videos
  
• SciShow
  
• Sixty Symbols
  
• Smarter Every Day
  
• Veritasium
  
  Anyway, hopefully you'll have some fun with your son and maybe even learn something.

Wrong subreddit u/AgileStretch but That's the Clue Luxury Edition by Winning Solutions. They make pretty cool editions of classics.

https://www.amazon.com/Winning-Solutions-Foil-Stamped-Storage-Accessories/dp/B004SRWHFM/

If anyone is interested, there's a really fun board game based on this concept called Yikerz. Basically, you try to fit as many magnets onto a game board as you can without causing a chain reaction.

https://www.amazon.com/Wiggles-3D-90045-Yikerz/dp/B002L16L68

Saw a guy at a music festival a few weeks ago wearing one of these as a bracelet and was definitely mesmerized! watching it crawl up and down his arm as he danced was fantastic and I wanted to ask him what it was or where he got it but lost him in the crowd before I could. So thanks for posting this with the name. That allowed me to find it on Amazon.

In my experience, most physicists write spaghetti code with no documentation that is a nightmare for others to work with, and even the original author of the code after not looking at it for a while.

While I don't think my code is that bad, I do think that I could have structured it to have fewer global variables by making better use of functions.

Here is a few quick tips for jupyter notebooks specifically. Here is a book on writing clean code. I would also recommend reading the python style guide (pep8 and pep257). I'd also highly recommend learning how to use a linter such as pycodestyle or pylint.

Not too difficult with a lathe and careful measurements.

You can buy a really high-end one here though.

This page as some good ones too

This just inspired me to buy a similar product from Amazon:

https://www.amazon.com/gp/product/B01M2AAK77/ref=od_aui_detailpages00?ie=UTF8&psc=1

Levitation kit is easy to find https://www.amazon.com/Magnetic-Graphite-Levitation-Demonstration-Kit/dp/B00EAXPJB8

Haven't seen any of these you can spin before though.

My immediate thought was, "I want one. " Looks like it's available here: https://www.amazon.com/gp/aw/d/B00OIYNC2M/ref=mp_s_a_1_5?ie=UTF8&qid=1505646110&sr=8-5&pi=AC_SX236_SY340_QL65&keywords=hourglass+magnetic+sand&dpPl=1&dpID=31EruQQgWDL&ref=plSrch

Same principle as the thin film that does the same, except easier to see how it functions.

The film I’m talking about

I think this is it, but the one review of the book on Amazon makes me believe the author is, in fact, a crackpot.

>Manson explains how most of the anomalies we find on this earth and its most dramatic features are only 6 to 12 thousand years old. Most all occurred in the year of the flood of Noah.

I think I'll stick with the other book of the same title. Seems more scientifically accurate.

Found it on Amazon here, but it might be cheaper on Vat19 or elsewhere. Google "blue magnetic putty".

I bet you are not from the US because "pipe cleaner" means something slightly different ( and no, I am not making a dirty joke).
https://www.amazon.com/dp/B00A6VWMYK/ref=cm_sw_r_cp_apa_i_4SI4AbH4MVGCE

Turns out it's just iron

I just bought this one $14 and it's color changing!

https://www.amazon.com/gp/product/B01HIMJ0KI/?ie=UTF8&psc=1

reading your post i was reminded i own a similar game, but i never play it

Jishaku

Hugh Howey wrote a book about this called Sand. It's a post apocalyptic book and they use vibrations to fluidize the sand and dive for old-world relics.
https://www.amazon.com/Sand-Omnibus-Hugh-Howey-ebook/dp/B00HSXGYCK

Joytech Precision Gyroscope Kill Time Metal Anti-Gravity Spinner Balance Toy Colorful JA05 https://www.amazon.com/dp/B07F1MVYHN/ref=cm_sw_r_cp_api_i_XApWDb1V1JBGH