I like this guys videos. I took this pic with my telescope, indoor:
http://www.pbase.com/mclemens1969/image/75141501

Visually through the eyepiece I could easily see the inner coil as well... from across the entire length of the house.

This is a really neat effect. Thanks @juliovega914 for some more info on the physics.

As aluminum isn't magnetic, in and of itself, the idea of using a magnet with aluminum can seem illogical. If it weren't for the eddy currents and Lenz's law it would make no sense.

I found a great real-world explanation of this same effect:

"A magnetic resonance imaging (MRI) machine uses an enormous and extremely strong magnet to study a patient's body. The magnet, which has its north pole at the patient's head and its south pole at the patient's feet, is actually a coil of superconducting wire through which electric charges flow.

Aluminum isn't normally magnetic, but as you carry a large aluminum tray toward the magnet, you find that the magnet repels the aluminum. Once again, Lenz's law. The magnet induces a magnetic field in the moving aluminum tray to oppose its own, effectively pushing it away.

You eventually manage to get the aluminum tray up to the magnet. As long as the tray doesn't move, it experiences no magnetic forces. But when you drop it, it falls past the magnet remarkably slowly. What slows down its fall?
That trickster, Lenz. When the tray is stationary, the magnetic field of the magnet is not changing, but as soon as it moves, the field begins changing and an opposing field is induced."

What bothers me more than the advertising to children is the fact that now the current biodegradable cardboard box will be replaced with a box that contains electronics equipment that will end up in the landfill. You have to have a basic coil of wire, some voltage converters, wires, resistors, and LED or other illuminating device.

I half expected some epic Aussie heading shirtless out into it with an inner tube in one hand, a beer in the other, and a coil of rope over his shoulder.

One would think that a set screw or shaft key has come loose, and instead of the fan pushing itself around the centre shaft, the coils (which are usually on the fan part for centrifugal reasons) are spinning the shaft, which would be holding the magnets.

Big mess of twisted up wires in there I bet. Probably why the lights aren't on.

>> ^Hybrid:

It's insane that the coiled loading process has not been mechanized.


Machines dont handle fibre spooling like that with enough finesse.

The cable shown in this video is of the unarmored variety. This is mainly laid in the deep segments of cable runs, where anchor drops are least likely to cause a cut. The cables that run from the shore out to depths that are unreachable by all but the largest seafaring vessels are armored even further with Kevlar sheaths covering quite a lot more steel wires wrapped around the thin inner core of the cable you see in this video.

Laying of the cable in the deep ocean requires a plow, the cable is literally sown several feet beneath the seabed with said plow to ensure that no anchor drops, or fishing nets can cause a cable cut.

Cables are laid in areas of ocean that are marked on sea charts as 'no-drop' zones. In most nations, dropping anchor in these areas carries a MONSTROUS fine, whether you cut the cable or not.

It's insane that the coiled loading process has not been mechanized.

Almost all energy consumed by households is avoidable waste:
* think about the way you fry eggs. 99% of the heat from the burner is going into the air, not into the eggs. This should be solved by using small device that is well insulated on all sides and has an internal heating coil.
* Ovens have a high heat capacity and shitty insulation. More energy is wasted on heating up the oven itself than actually goes into the food. This could be solved by lining the inside of the oven with silica aerogel instead of metal. If an oven is properly insulated it will not feel very warm to the touch on the outside, even after being on for an hour.
* Most of your heating and cooling energy leaks out the windows -- if their inside surface feels significantly above or below ambient during extreme weather, your heating and cooling energy is being wasted and hemorrhaging out the windows. It would literally save energy to have a webcam on the roof and display that image on an LCD inside instead of having windows, if you live in a climate with extreme temperatures (especially in cold climates, as the energy used for the LCD would contribute to heating the house). All ventilation needs can be accomplished through a small portal with a fan (and a heat exchanger, of course).
* Hot water is produced very wastefully by just dumping energy into it instead of using a thermodynamic cycle to transfer heat and produce something cold as a byproduct. Hot water could be co-produced with cold water for AC / Refrigeration much more efficiently than doing them all separately.
* Hot water goes down the drain. This should at least go through a heat exchanger, which would dramatically lessen the amount of work that has to be done to heat up new hot water. A 7 Liter per minute showerhead putting water 30 degrees F above ambient down the drain is wasting over 8135 watts as long as it is running. However, I don't know of any houses yet designed with a heat exchanger between the shower drain water and the intake of the water heater.
* Fluorescent lights. Duh. Incandescent bulbs should be banned.
* Freezers built with the door on the top will waste much less energy to the convection of air when opened, for obvious reasons.

Here ends the lifestyle-neutral list of suggestions. The following would involve sacrificing something:

* Reduce excessive lighting -- if people wouldn't fuck up their retinas by driving just after sunrise or just before sunset, or seeing specular reflections of the sun on shiny cars and buildings outdoors, they wouldn't need such bright lights indoors. A 1 watt LED is plenty for reading. Sunlight could be used in the daytime instead of artificial lights.

7 more comments have been lost in the ether at this killed duplicate.

>> ^siftbot:

Duplicate video nomination cannot be seconded by the submitter of the original video - ignoring isdupe request by Seric.


Dyawww.....damn conflict of interest *mumble mumble*

>> ^mintbbb:

Sorry, but a dupe.
dupeof=http://videosift.com/video/ArcAttack-s-Lightning-Proof-MIDI-Guitar


Whoops. The version I came across on YT was just a couple of hours old.

>> ^MarineGunrock:

Nope. No tech tag. I tried to make one like two years ago but got shot down because there's "too much overlap between geek and science."
Good thing we've since created a jazz, country, rock and roll, classical, electronica, hip hop, livemusic, obscure, metal, blues and even Celtic.
Oh, what? You tell me that we also have a "music" channel? Well that's just going too far.
Seriously. I get shot down for a tech channel and yet we have a "wilhelm" channel (no offense to YDJ. What gives?


Technology can be distinct from science, engineering and geek. I think it would be a nice addition.

As for the music, they all seem to be types of music that have a culture attached to them...perhaps with the exception of electronica but I guess that's the newest one.

It would be neat to properly channel this *Tech.

>> ^westy:

kinda cool ,
strangley i have found gass stoves to be the best over all the stoves i have ever used ,
this would be allot cooler if it aplied the same concept but used gass soem how ruting it around the table lol


Yeah, same. It's great to have that instant heat, not having to wait for the coils or whatever to warm up. It's by far the best I've found for things you need a high heat for.

the re-coil is my favorite part. 2:04

I thought nothing could make tesla coils lame.

This video is lacking a tesla coil tag.