search results matching tag: ions

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (74)     Sift Talk (0)     Blogs (3)     Comments (155)   

TED - Steven Pinker: Chalking it up to the blank slate

Behind the Scenes with William Shatner

Electric Ninja 750 conversion

oileanach says...

Those looked like lead/acid batteries conan, and I don't they in general are apt to burn like lithium ion laptop batteries (nowhere near the energy density either). Of course you're more likely to get an acid burn when you crash, but is that better or worse than a gasoline fire and smaller acid burn from a regular bike?

The power source is a serious issue I agree. I can't stand it when people suggest that electricity (or similarly hydrogen) is a SOURCE of energy - it's just a means of transmission. Now in a place like France where they have more nuclear power than they can use (especially at night) charging batteries would be a good alternative to burning fossil fuels.

Still a good video!

Chevy Volt: the most important American car... maybe ever?

Chevy Volt: the most important American car... maybe ever?

bamdrew says...

The change to lithium ion-batteries that have a lifetime less than the lifetime of the average car might be a big one...

I always assumed the EV-1 idea was trashed precisely because the battery technology that allowed 100miles per charge burned down to 25-50 miles per charge after only a year or two, requiring the replacement of what was probably the most expensive component of the car.

Plasma Propulsion Testing

Constitutional_Patriot says...

You'll notice that the engine was being tested in a vacuum chamber to simulate a void like outer space.

In layman's terms: this is like a weak version of the USS Enterprise's impulse engines.

See http://www.videosift.com/video/NSTAR-Ion-Plasma-Propulsion-1st-generation for more info when an earlier version that was used on a satellite.

I'm surprised there's no votes at ~50 views.. this has been talked about every so often on NPR since 2004.

EDD (Member Profile)

GeeSussFreeK says...

In reply to this comment by EDD:
^ CONCERNING STRANGELETS:

First of all, strangelets are merely hypothetical type of matter. None have so far been observed or produced. We would see some corrution of Neutron stars more often if the stuff was actual and not theoretical. Lambda particles I think have happened, but they decay so fast it is not really a subject of much fear mongering

Secondly, the RHIC (Relativistic Heavy Ion Collider) in the US has been working for 8 years now and no strangelets have been produced there. In comparison, LHC collisions will have more energy, thus making it even less probable a strangelet might form (equivalent would be ice forming in boiling water). In addition, LHC quarks will be even more dilute than at RHIC.

Read this study on RHIC by MIT, Yale and Princeton physicists to find out more.



"It is believed that the higher energy of the lead-lead collisions of the Large Hadron Collider (LHC), compared to the RHIC, will produce more strange quarks in the quark-gluon plasma (QGP) than are produced at RHIC's QGP. This higher production of strange quarks might allow for production of a strangelet at the LHC, and searches are planned for such upon commencement of collisions at the LHC ALICE detector."

"Angelis et al., "Model of Centauro and strangelet production in heavy ion collisions", Phys. Atom. Nucl. 67:396-405 (2004) arXiv:nucl-th/0301003 "

I thought that was an interesting read on the subject. It's all theoretical though, so far, we haven't really seen the stuff at all.

Sorry for the long gap between posts, the hurricane messed with my normal routine.

OMG THE HADRON COLLIDER IS TURNED ON!!!

EDD says...

^ CONCERNING STRANGELETS:

First of all, strangelets are merely hypothetical type of matter. None have so far been observed or produced.

Secondly, the RHIC (Relativistic Heavy Ion Collider) in the US has been working for 8 years now and no strangelets have been produced there. In comparison, LHC collisions will have more energy, thus making it even less probable a strangelet might form (equivalent would be ice forming in boiling water). In addition, LHC quarks will be even more dilute than at RHIC.

Read this study on RHIC by MIT, Yale and Princeton physicists to find out more.

Solar Sail Simulation

honkeytonk73 says...

I'd like to see how they stop once they got to the star. Simply turning the sail around would not be enough. A combination of solar sail and ion propulsion (ion not in the acceleration phase, but for the deceleration phase). It is unclear whether the flight time is direct at maximum speed the entire way.

~3200+ years though. That is a LONG time. If we can someday get the travel time down to decades or even a century, there may be potential for a mission. Send it off. Get it into orbit.. and have it send back data. Of course, the thing would need to be completely automated. AND we'd need to have someone back at Earth with an ear to the sky, waiting for a signal.

I wonder how practical sending data such a distance would be. The energy required. You'd need one heck of a powerful transmitter.

I suspect technology would improve in time (especially 3200 years) that would obsolete the mission to begin with. Imagine sending such a ship... to have a faster one PASS it on the way to the star 1000 years later.

Problem Child - Lemonade & Scenes

Promo Vid: How Not To Sell Microcontrollers :)

gorgonheap says...

Here is a list of things that can also power the Texas Instruments micro controller: Aardvarks, ants, apples, Avril Lavine, Breadfruit, baguettes, Brussel sprouts, Bark, Batteries, Coneys, Carpet, Cats, Crumbs, Crap, Dams (beaver or man-made), Droids, Energy, Flies, Fruit (any kind), Fire, F-words, Fusion reactors, Grenades, Gum, Guilt imposed on you by your ex, Hedgehogs, hemroids, hockey players, Ion engines, Jack in the box food, kinetic energy, killer bees, linen, locomotives, morose code, melons, Montgomery Burns, name calling, nebula, noogies, and anything you can find in a grocery store or McDonald's.

Do boomerangs work in space?

Do boomerangs work in space?

Do boomerangs work in space?

jwray says...

D) Fusion reactors small enough to put in a space ship
E) Better Ion Thrusters
F) Electromagnetic interstellar gas collector to replenish fuel
G) Electric-lighted botanical gardens in space, fertilized by excrement
H) Combine D through G in a spaceship for a comfy 1000-year trip to Alpha Centauri and back.*
I) Now here's the one that requires changing the laws of physics: WARP DRIVE!!


*: Hydrogen fusion converts about 1/1000 of the mass into energy while burning hydrogen plus oxygen converts only 3/10,000,000,000 of the mass into energy. So you get about 3 million times more energy from your fuel per kilogram compared to conventional rockets. That means you can eject your exhaust about (the square root of that) 1800 times faster and go about 1800 times faster.

The fastest conventional rocket yet (Voyager 1) used several stages and gravity assists to get to about C/17,000 (17.46 km/s), which would be fast enough to get to alpha centauri and back in about 150,000 years. (150,000 / 1800) + slack = 1000 years.

9/11 WTC 7 Collapse: Is it a controlled demolition?

choggie says...

“It looked like a classic controlled demolition, said Mike Taylor of the National Association of Demolitions Contractors in Doylestown, Pa.

“If there’s any good thing about this it’ that the towers tended not to weaken to one side, “said Taylor. “They could have tipped onto the other buildings…”
The collapse of the WTC Towers mirrored the strategy use by demolitions experts. In controlled demolitions, explosives are placed not just on the lowest three floors but on several consecutive floors..the explosions at the higher floors enable the collapse to gain downward momentum as gravity pulls the full weight of unsupported higher floors down into lower floors ion a snowballing effect.
It cascaded down like an implosion” Says Taylor.

-New Scientist, 12 Sept. 2001


Analysis of dust samples
heavy Metals
Murcury
Asbestos
the cocktail was extremely alkaline +/-15)


The government (EPA) assured no health risks-(falsehoods, lies)
The NIST ruled out controlled demo as a possibility and DID NOT INVESTIGAT based on this premise....

7 yrs later, and nobody gives a fiddlers fuck enough to re-open the case and leave it to public scrutiny??? Even if we could, too late to prove anything based on evidence, which has all nut been conveniently destroyed.

People are still dying from the toxins they breathed in that day.

returned to this post to see hwo chime in-
As always, JAPR showing the ass.....



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon