Nothing special here... Move on...

When my dad worked for Bell Labs (NJ) in the early 1950's, he suggested they promote research into using fiber optics. They pooh-poohed him. They said it was impractical.

He quit there and went to work for Lockheed/NASA.
 
Daredevel7 said:
Where did dry ice come from?

It looks like they were using liquid nitrogen to freeze the semiconductor.

Liquid nitrogen is three times colder than dry ice.

Dry ice evaporates at -109 deg F. (Not really evaporation.. sublimation)
Liq Nitrogen evaporates at -321 deg F.

Just giving people an idea of how cold the semiconductor must be for this to work.

However, I am not a party pooper like Jiro. I do hope future technology comes out of this that would blow our minds today.
Click to expand...

Remember the video I posted?
 
posts from hell said:
Remember the video I posted?
Click to expand...

???

the OP or.....

I am a lost cat...

missing_missy3.jpg
 
Daredevel7 said:
???

the OP or.....

I am a lost cat...
Click to expand...

I am pretty certain the pucks in the video in the first post of this thread are dry-ice pucks. That's where we got the idea of dry ice from. Doesn't have to be quite -300F to have this effect.

Looks like Jiro got you. I expected better.
 
posts from hell said:
I am pretty certain the pucks in the video in the first post of this thread are dry-ice pucks. That's where we got the idea of dry ice from. Doesn't have to be quite -300F to have this effect.

Looks like Jiro got you. I expected better.
Click to expand...

you're talking about some magic show scale. now.... for real-life scale? yep gonna be colder than that.
 
Some astronauts talked of returning to Mars. WTF??
 
Audio- "So it's frozen with liquid nitrogen..."

If I could understand them better I'd do the whole thing...

Basically the scientist says the same things over and over and the reporter ask mostly dumb questions.

The 'puck' is a superconductor that is cooled with liquid nitrogen. Trapping the superconductor is a magnetic field - but instead of pushing or pulling like magnets do this superconductor is trapped exactly wherever it is put. It apparently can also spin on its axis.

(robots have been to Mars- maybe they are robots?)
 
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Jiro said:
you're talking about some magic show scale. now.... for real-life scale? yep gonna be colder than that.
Click to expand...

Maybe those physicists will experiment with liquid helium?? Since it is colder than nitrogen.

I can picture that now, future hovercraft leaking helium and people nearby talking in high pitch. :lol:
 
naisho said:
Maybe those physicists will experiment with liquid helium?? Since it is colder than nitrogen.

I can picture that now, future hovercraft leaking helium and people nearby talking in high pitch. :lol:
Click to expand...

Well that would be pretty close to absolute 0*(k) - think you'd have more problems then squeaky voice...

;)
 
naisho said:
Maybe those physicists will experiment with liquid helium?? Since it is colder than nitrogen.

I can picture that now, future hovercraft leaking helium and people nearby talking in high pitch. :lol:
Click to expand...

I'm going to see if I can copy a 5-seconds scene from this movie I watched last night :)
 
posts from hell said:
I am pretty certain the pucks in the video in the first post of this thread are dry-ice pucks. That's where we got the idea of dry ice from. Doesn't have to be quite -300F to have this effect.

Looks like Jiro got you. I expected better.
Click to expand...

Are you sure? Because every thing I see relating to this shows that its just semiconductor soaked in liquid nitrogen for a while.

See it in Action

(skip to 1:00)

Frozen Puck Hovers Over Track Using “Quantum Levitation” | Wired Science | Wired.com
 
PFH - considering he touched it with his bare hands, you are probably right. No way would he have been able to touch it if it was cooled with Liquid nitrogen.
 
On Tuesday, I ate a marshmallow that was frozen from liquid nitrogen, so......

Heat transfer is rapid when the temperature difference is huge.

You just can't touch liquid nitrogen, but you CAN touch an object frozen from liquid nitrogen.
 
^^^^^ Ah! thanks for clarifying that for me. I was a little puzzled given that I have never had the chance to play with anything that cold! :)
 
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