>> ^ant:

>> ^rottenseed:
Did your new robot legs come in yet? Those will be SWEET!>> ^ant:
Yay! Wow 29 years! I got mine when I was a few years old. I still use bone conduction analog hearing aid (don't like implants). I need to get a new one since mine is cracked and getting lots of interferences due to dying coils.


No. When is it supposed to come in? I didn't know it was coming to me as a free gift/present.

Did your new robot legs come in yet? Those will be SWEET!>> ^ant:

Yay! Wow 29 years! I got mine when I was a few years old. I still use bone conduction analog hearing aid (don't like implants). I need to get a new one since mine is cracked and getting lots of interferences due to dying coils.

Yay! Wow 29 years! I got mine when I was a few years old. I still use bone conduction analog hearing aid (don't like implants). I need to get a new one since mine is cracked and getting lots of interferences due to dying coils.

Video: cool
Explanation: weak
Tennis analogy: false

Better explanation: Initially, gravity is pulling the whole thing downward while the hand pulls the top upward and the rest of the slinky pulls itself upward and downward creating a balance. Then the old dude lets go of the top. The force pulling up on the bottom still exists, but it is now balanced by accelerating the top downwards faster than just gravity (notice how the slinky slows down as it collapses and loses force. As long as the coils are still taut, the upward force pulling the bottom of the spring up is the same. The top is now falling (being pulled down, actually) instead of pulling the old dude's hand, but the force in the spring is the same.

My guess is that a solid object dropped from the height of the middle of the slinky would hit the ground at the same time as the slinky did. But is that the middle point of a slinky stretched like this one (the top is stretched more than the bottom), or the same middle as when it's all neutral.

Tennis: With all the flex in a tennis racquet's webbing, the the player may feel the ball while it's still on the racquet, before the webbing shoots the ball back out again, but certainly long before it gets to the net.

http://www.youtube.com/watch?v=QvZ7prb43Lk (watch the vibrations in the racquet)

Does the wire have to be in a coil formation for this to work? Or are they just getting more surface area for the demonstration?


What is it about copper that reacts chemically to other substances?

I wish I'd taken chemistry in school.

>> ^fissionchips:

It's a little complicated, because aluminum is also a good conductor (ie. low electrical resistance). To keep the coil from overheating, these induction forge rigs have water hoses that circulate cold water through the copper coil. >> ^Ornthoron:
>> ^mxxcon:
how did those copper tubes didn't melt?

Copper is a better conductor than aluminium.

water and electricity?

It's a little complicated, because aluminum is also a good conductor (ie. low electrical resistance). To keep the coil from overheating, these induction forge rigs have water hoses that circulate cold water through the copper coil. >> ^Ornthoron:

>> ^mxxcon:
how did those copper tubes didn't melt?

Copper is a better conductor than aluminium.

Tags for this video have been changed from 'silver nitrate, copper coil, copper, silver, ion, crystal' to 'silver nitrate, copper coil, copper, silver, ion, crystal, chemistry, chemical reaction' - edited by calvados

>> ^TheFreak:

>> ^volumptuous:
What's your point GSF?

He's just sad you left him off your blacklist of delusional posters.


I'm sad that I am a human being and deserve some decent human respect for my thoughts. I am not a moron, and @volumptuous position is demeaning and dehumanizing, as is your remark. Thanks for your inhumanity, it marks more reason I wish I had to courage to shuffle off this mortal coil.

>> ^drk421:

>> ^Boise_Lib:
The capacitors aren't the problem as stated above. The CRT itself is a very large capacitor (stores charge) and can knock you on your ass for a long time after the tv is unplugged.
Also, she's weird.

Yeah, my old boss got shocked by the CRT discharge and his arm swung against the side of the wall and he got cut really bad. It has about the same effect has getting shocked by an ignition coil from a car. I had a similar situation while working on a tube amplifier (around 600V).
High voltage DC will basically burn you really bad (provided it has enough current), but unless you have heart condition it probably won't kill you. It will defibrillate you and wake you up though.
High voltage low frequency AC (between 30 and 1000hz) is deadly starting at around 45 volts. As you get into the higher frequency AC voltages it has less affect on your heart, and thus less likely to kill you.


I saw a chart once in physics class that showed the lethality vs. frequency of AC. The peak was at 50 Hz--right where Europe put their power supply.

I got bit by 277VAC 50Hz once--burned a 1/2 inch hole 1/4 inch deep in my arm.
(I wish we had the metric system in the old USA)

>> ^Boise_Lib:

The capacitors aren't the problem as stated above. The CRT itself is a very large capacitor (stores charge) and can knock you on your ass for a long time after the tv is unplugged.
Also, she's weird.


Yeah, my old boss got shocked by the CRT discharge and his arm swung against the side of the wall and he got cut really bad. It has about the same effect has getting shocked by an ignition coil from a car. I had a similar situation while working on a tube amplifier (around 600V).

High voltage DC will basically burn you really bad (provided it has enough current), but unless you have heart condition it probably won't kill you. It will defibrillate you and wake you up though.

High voltage low frequency AC (between 30 and 1000hz) is deadly starting at around 45 volts. As you get into the higher frequency AC voltages it has less affect on your heart, and thus less likely to kill you.

>> ^deathcow:

Looks like 10 people showed up.


Their numbers are dwindling. They kick out their own sons and daughters for even being the slightest bit tolerant. That kind of hate is not sustainable.

When Phelps and his daughter shuffle off this mortal coil soon, I doubt WBC will survive for long...if that.

They're the ultimate trolls. I'm still of the opinion that if the press would stop giving them attention, they'd wither and die...but "news" always looks for the sensationalism so...

I'm around, everyone. Just not around enough to chat. I get a moment or two to pop on the baby daddy's computer. Still waiting on the part I ordered for my car, a front coil overspring thingy.

So nice, especially the coil of iron.