Physics on Etsy!

Tessellating Geckos

These laser cut hardwood geckos are available here: 
From Etsy: BUY NOW Tessellating Geckos 

Tessellating Geckos: MC Escher inspired lizard cutouts interlock precisely to tile a surface with no overlaps or gaps. Laser cut from maple, walnut, and cherry wood by maker/artist Craig Caesar and inspired by MC Escher’s “Study of Regular Division of a Plane with Reptiles” 1939. G4G week: Martin Gardner wrote about the art and math of Escher in 1961- which helped create the popularity that his work has experienced ever since.

Arrow on Mobius Strip

Get this 3D printed object of math topology here:

From Etsy: BUY NOW: Mobius Strip with Arrow

Arrow on Möbius Strip: on the geometry of a Möbius strip a right pointing arrow points left after one trip around, a second trip restores the original orientation. This mathematical property is called non-orientability, and is also true of Klein bottles which I’ve posted about. I love how this 3D printed model, designed and produced by Wes Pegden, allows one to physically manipulate and intuit this somewhat obscure mathematical property. 

Vortex Marble

Some examples of O'Grady's vortex marbles are available on eBay: 
From eBay: BUY NOW Vortex Marbles by Kevin O'Grady 

A number of artists now offer vortex marble art on Etsy 
From Etsy: BUY NOW Vortex Marbles 

Vortex Marble: glass art intersects with the physics of optics in this lampwork art form invented by Kevin O’Grady circa 1994- and this marble bears his signature mark on the back. The clear glass face on these marbles acts as a convex lens giving the illusion that the spiral goes deeper than the diameter of the marble. Different kinds of dichroic glass (doped with thin layers of metals and oxides) is mixed in to the borosilicate marble to create the intense colors.


Giant Newton's Cradle

This industrial grade museum quality device available here:
From Etsy: BUY NOW: Giant Newton's Cradle

Regular sized Newton's cradles availabe here:
From Amazon: BUY NOW: Newton's Cradle

Newton's Cradle: industrial model made with galvanized aircraft cable, aircraft aluminum for the frame, and 1.5 inch one-half pound nickel plated chrome steel spheres. (0.23 kg and 3.8cm in diameter each) The classic demonstration that shows the curious behavior due to conservation of both momentum and kinetic energy. Swipe to see comparison to standard version.

Pentominoes

Get this set here: 
From Etsy: BUY NOW Hardwood Pentominoes 

Many versions available here: 
From Amazon: BUY NOW Pentominoes 

The book by mathematician Solomon Golomb that started the polyonomo recreational math craze:
From Amazon: BUY NOW: Polyominoes 

Pentominoes: The 12 possible arrangements of five identical squares joined edge to edge. Since 5x12=60, the pentominoes can tile a 6 x 10 rectangle with no gaps (2339 ways to do this- yet even finding one solution is a challenge). I love this beautiful set from artist/woodworker Ron Moore where each pentomino is made from a different kind of hard wood. 

Eclipse

Click here to visit this amazing Etsy shop Element83 
Get a magnetic levitation sculpture here: 
From Etsy: BUY NOW Diamagnetic Levitation Sculptures 

Eclipse: A diamagnetic levitation sculpture by Element83. Cast from diamagnetic Bismuth, a golden spherical neodymium magnet levitates trapped in a tunnel within the metal. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the sphere magnet supplies the field. Diamagnetic fields are pretty weak though so a powerful cube neodymium magnet sits above the tunnel and is adjusted to help lift the sphere magnet against gravity. Trapped in equilibrium by these fields, any other magnet brought near will change the balance. ?Another amazing creation by Ernie McElhannon. 

 


Mini Double Pendulum

Get this precision machined and balanced desk pendulum here: 
From Etsy: BUY NOW Double Chaotic Pendulum 

Mini Double Pendulum: the intricate dance of chaotic motion from a simple assembly of two physical pendulums (one attached to the end of the other) with the energy of the system moving frenetically back and forth between the potential energy of gravity to the kinetic energy of motion. Chaotic motion (shown here in 240 fps slow motion) is characterized by extreme sensitivity to initial starting conditions, tiny differences in how the system is released leads to dramatically different outcomes each time. This well made precision bearing double pendulum is made by Doug Cvelbar.

Satisfying Hexagons

Get this 3D print here (your choice of colors):

From Etsy: BUY NOW: Satifying Hexagons

Satisfying Hexagons: this delightful kinetic art manipulation toy features 19 nested hexagons within a hexagonal frame. Embedded magnets allows one to move the central hexagon from behind creating interesting visual effects. A 3D print created by @i.am.the.lazy.engineer- indeed oddly satisfying!

Trammel of Archimedes

Get similar devices here: 

From Etsy: BUY NOW 
Trammel of Archimedes

From eBay: BUY NOW 
Trammel of Archimedes

Trammel of Archimedes: as the shuttles take turns completing their straight line journeys, the end of the crank arm traces an ellipse. Sometimes sold as a “do nothing machine” or “nothing grinder”, far from doing nothing this simple and crucially important mechanism demonstrates how rotational motion can be converted into translational oscillatory motion- such as how a piston can drive an engine’s crankshaft. This version was crafted from fine maple, cherry, and oak by artisan Neal Olsen. 


5 Shuttle Trammel of Archimedes

Get similar devices here: 

From Etsy: BUY NOW 
Trammel of Archimedes

From eBay: BUY NOW 
Trammel of Archimedes


See this great video by the Mathologer for more details: Secrets of the Nothing Grinder 

5 Shuttle Trammel of Archimedes: similar to yesterday’s post- but more math is revealed as extra shuttles are added. As the shuttles take turns completing their straight line journeys, the end of the crank arm traces an ellipse- and each of the five shuttle points define points on a smaller circle that rolls within the perimeter of the device. This version was crafted from fine maple, cherry, and oak by artisan Neal Olsen. 

Fulgurite 

It's now possible to obtain a fulgurite sample at a resonable price. Many sellers on Etsy offer a wide selection of specimens:

From Etsy: BUY NOW: Fulgurite Frozen Lightning 

Fulgurite: glass formation from when lightning strikes sand. One of only four ways to produce natural glass- volcanos, earthquakes (pseudotachylite from fault zones), meteor impacts (tektites and impactites), and lightning strikes (fulgurites). This fulgurite tube was collected from the Egyptian Saharan desert.

Single Tube Nixie Clock

This single tube version is an affordable alternative to showcase the vintage aesthetic of the Nixie neon glow:
From eBay: BUY NOW: Single Tube Nixie Clock Base (buy the tube in the next link)
From eBay: BUY NOW: IN14 Nixie Tube

Get the diffraction grating here:
From Amazon: BUY NOW: Diffraction Grating 

Get a beautifully made full four digit clock here:
From Etsy: BUY NOW: Nixie Tube Clocks 

Single Tube Nixie Clock: This minimalist clock uses a standard 5V USB connection and modern electronics to power a single Russian made ИH-14A Nixie tube- here the display shows the time 12:36 flashed in sequence. Long before there were 7 segment LED displays there was the Nixie- cold cathode tubes with a wire mesh and 10 cathodes shaped in the form of numerals 0-9 that illuminate through neon glow discharge at 170Volts. A diffraction grating reveals the brightest emission lines of the neon spectrum including: violet, green, bright yellow, and a bunch of orange/red lines characteristic of this noble has. The “Numeric Indicator eXperimental 1” or NIX 1 was introduced in 1955 by Burroughs Corporation and manufactured until the 1990s.