How does an Electric Motor work? (DC Motor)
Electric motors can seem very mysterious! How do they use electricity to start rotating? Let's break it down step by step to understand how it works. Topics covered in this video: circuits, current, magnets, electromagnets, armature, commutator, br
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15000 mw Blue CNC Laser Engraving Machine
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Living off the Land - Feed Your family from Your homestead
A homestead is a place of production. Food, fiber, and fuel are just a few of the things a homestead can produce for a family. Most importantly, a homestead can produce a great quality of life for you, and those you care most about.
Morphing carbon fiber composite changes shape on demand
Although we have seen "morphing" structural materials before, they typically incorporate solenoids, pumps or motors that add weight and complexity. Now, however, scientists have developed a carbon fiber composite that shifts shape with a simple shot
"Unsinkable metal" stays afloat even with holes punched in it
Superhydrophobic materials, which are excellent at repelling water, can be extremely useful for a whole range of reasons, both obvious and not-so-obvious. They can prevent ice from building up on surfaces, make electronics waterproof, make ships more
What do babies think?
"Babies and young children are like the R&D division of the human species," says psychologist Alison Gopnik. Her research explores the sophisticated intelligence-gathering and decision-making that babies are really doing when they play.
3D Printing The Precariat - PiratesWithoutBorders Ship
Below are Wavefront .OBJ files suitable for 3D printing. The ship is broken into 5 sections to be printed separately, then manually assembled. I do not recommend printing the solar panels because their curved shape requires a lot of support material.
How electricity works. . . . animated
How electricity works in buildings, including power, current, voltage, direct and alternating current, transformers, and the compelling stories of Tesla and Edison
Cell division recreated outside of a cell for the first time
Cell division is one of the most fundamental biological functions, vital to life – but there's still so much about it that we don't understand. In an attempt to find out more, researchers at the University of Chicago have now managed to recreate ce
Scouting for Intellect: Sue Khim at TEDxUChicago 2013
Sue Khim is the CEO of Brilliant. Brilliant is a problem-solving website in mathematics and science for high aptitude students. Brilliant aims to democratize the way smart, driven youth are identified and developed by making an intellectually challen