It's not a contradiction really. If you completely enclose one of these magnets in your hand, you can attract the other one all the way through your hand and it'll stay there without too much force because it's over half an inch away from the other one.
If you get a little chunk of flesh (i.e. part of one finger) in between them, the magnetic force is much stronger when they get that close together, and they can pinch you bad.
Depends on the disk, modern disks, especially the extremely low profile 20gbs that are out now probably have pretty wimpy magnets. Older and larger disks have huge and very powerful magnets in them.
They didn't gain energy, there was potential energy between the magnet and the paper clips, once they were drawn to the magnet, this potential energy changed to kinetic energy.
If you wanted the paper clips off the magnet, you'd have to expend a greater amount of energy separating them than was released when the magnet attracted them.
It's the same as something falling to the ground. If a meteor in orbit around earth falls to earth, it's not creating energy, it's just changing that relative potential energy to kinetic and heat energy. If we wanted to launch the rock back into space, we'd have to expend more energy to do it than was released in it's falling.
How (in)efficient is it to connect two DC motors directly together.
Very.
What percentage of loss will there be?
Efficient AC motors run about 80% efficient, up to maybe 95% or so. The efficiency varies with the load. Efficiency approaches zero as load approaches zero, and efficiency approaches zero as load increases to the point when the shaft stalls. So there's a graph with a hump in the middle.
If his theory is correct that he is actually taking energy from the earth (non electro-) magnet,
His theory is false. That's like saying you harnessed energy by dropping something on the floor. You still have to spend (more) energy picking it up again if you want to drop it again.
If he wants to convince people of his perpetual motion machine, then his should indeed hook two of them together with no external power source and then just let them run. If he is correct, they will run faster and faster until either the explode, or they hit a speed where they are not efficient enough to go faster.
In any case, we could use them to completely solve all future power problems in the world. Of course, since this guy is a scammer, this won't happen.
To the contrary, the magnets in your hard disk are the most powerful types of permanant magnets, rare earth magnets. They are very strong. A single hard disk magnet can usually lift at least 10 pounds, maybe more.
Nethack et al do the same thing. It's cool that they are random from game to game, but once generated, they are persistant.
Back in the day, Telengard for the commodore did this too, except it made the levels very huge, and the same from game to game, so that the level was always the same for everyone, but it was never stored anywhere, it was only generated from the "seed", which never changed.
Yeah, but there doesn't seem to be a clear cut line. From what he's said, the data is pretty much secure. As secure as any normal data was 15 years ago.
Sure, it could (and probably should) be more secure, but does FERPA lay out detailed standards for encryption and data security practices? I personally don't know, but I seriously doubt it.
(On the other hand, I see no use in putting that data on the web, of course he knows his own SSN and personal info.)
The wealth doesn't just dissappear. If all the high paying jobs go somewhere else, you better set up a marketing department in that "somewhere else".
The bottom line though is that the money is flowing back into the US. If anything, the other countries have a higher chance of getting fucked over in the deal than we ever did.
Speak for yourself. The current trend in offshoring has only served to strengthen my beliefs in capitalism and free trade as a workable system.
Anyone who claimed to be libertarian and wasn't ready to follow through on the personal consequences of their philosophy, should it be applied to them, obviously didn't think things through very well.
A much harder task. I was hired as a tutor by a 90 or so year old guy once, he got a new mac, his first computer ever. It took two training sessions to get the whole "how to move the mouse" thing down, something my son easily learned when he was 3 years old.
Personal firewalls do provide an important service that most don't appreciate, a personal level of egress filtering, based on applications rather than packets or ports.
This sort of thing would be valuable even on more secure OS's like Linux or BSD. I'm not sure if any are available, but I know of none installed or enabled by default.
Re:Good... down with Real
on
Real Problems
·
· Score: 1
And a key difference: PDF is an open format. Yes, it's owned by Adobe, but the (complete!) specifications are released under a very permissive license that allows pretty much anyone to write a complete implementation to read or write the format.
Adobe reader remains the default reader for many people not because of IP games and threats, but because it is the most complete implementation of the PDF specification currently. This is the way it should be.
Yes, Adobe has played stupid IP games in the past, but PDF and PS are two things that they have done right.
It's worth having, but it's worth having for the $60 a year it used to be. The thing worth having is the updates. The $179 doesn't get you any support, period. Only updates.
When I bought my house, I figured I'd get the low end model, since I thought that in 12 months, a house that was twice as big with twice the features would be out for about the same price.
Maybe, but only in the sense that someone who paints portraits of lots of boats gets familiar with the different parts of a boat. That painter will never learn how a diesel engine works from painting portraits of boats.
Put another way, a "real" AI would make a good chatterbot, but a good chatterbot is not too likely to ever become a real AI.
Slashdot Mirror
It's not a contradiction really. If you completely enclose one of these magnets in your hand, you can attract the other one all the way through your hand and it'll stay there without too much force because it's over half an inch away from the other one.
If you get a little chunk of flesh (i.e. part of one finger) in between them, the magnetic force is much stronger when they get that close together, and they can pinch you bad.
Depends on the disk, modern disks, especially the extremely low profile 20gbs that are out now probably have pretty wimpy magnets. Older and larger disks have huge and very powerful magnets in them.
They didn't gain energy, there was potential energy between the magnet and the paper clips, once they were drawn to the magnet, this potential energy changed to kinetic energy.
If you wanted the paper clips off the magnet, you'd have to expend a greater amount of energy separating them than was released when the magnet attracted them.
It's the same as something falling to the ground. If a meteor in orbit around earth falls to earth, it's not creating energy, it's just changing that relative potential energy to kinetic and heat energy. If we wanted to launch the rock back into space, we'd have to expend more energy to do it than was released in it's falling.
How (in)efficient is it to connect two DC motors directly together.
Very.
What percentage of loss will there be?
Efficient AC motors run about 80% efficient, up to maybe 95% or so. The efficiency varies with the load. Efficiency approaches zero as load approaches zero, and efficiency approaches zero as load increases to the point when the shaft stalls. So there's a graph with a hump in the middle.
If his theory is correct that he is actually taking energy from the earth (non electro-) magnet,
His theory is false. That's like saying you harnessed energy by dropping something on the floor. You still have to spend (more) energy picking it up again if you want to drop it again.
If he wants to convince people of his perpetual motion machine, then his should indeed hook two of them together with no external power source and then just let them run. If he is correct, they will run faster and faster until either the explode, or they hit a speed where they are not efficient enough to go faster.
In any case, we could use them to completely solve all future power problems in the world. Of course, since this guy is a scammer, this won't happen.
To the contrary, the magnets in your hard disk are the most powerful types of permanant magnets, rare earth magnets. They are very strong. A single hard disk magnet can usually lift at least 10 pounds, maybe more.
You don't see the irony? An anonymous user of a service meant for a specific segment of the population is abusing it. :)
Nethack et al do the same thing. It's cool that they are random from game to game, but once generated, they are persistant.
Back in the day, Telengard for the commodore did this too, except it made the levels very huge, and the same from game to game, so that the level was always the same for everyone, but it was never stored anywhere, it was only generated from the "seed", which never changed.
Except it boils at low temps, so there'll be a lot of it in gas form too once it hits the fire.
Yeah, but there doesn't seem to be a clear cut line. From what he's said, the data is pretty much secure. As secure as any normal data was 15 years ago.
Sure, it could (and probably should) be more secure, but does FERPA lay out detailed standards for encryption and data security practices? I personally don't know, but I seriously doubt it.
(On the other hand, I see no use in putting that data on the web, of course he knows his own SSN and personal info.)
To abuse a cliche "follow the money"...
The wealth doesn't just dissappear. If all the high paying jobs go somewhere else, you better set up a marketing department in that "somewhere else".
The bottom line though is that the money is flowing back into the US. If anything, the other countries have a higher chance of getting fucked over in the deal than we ever did.
Do you have the slightest idea about the basic theories of international trade?
Speak for yourself. The current trend in offshoring has only served to strengthen my beliefs in capitalism and free trade as a workable system.
Anyone who claimed to be libertarian and wasn't ready to follow through on the personal consequences of their philosophy, should it be applied to them, obviously didn't think things through very well.
We have these things called "civil torts". When you damage someone by costing them lots of money or time, you can get sued to get it back.
. I figure it's an easy out if I get busted for downloading mp3s or Windows source code ;)
Until they send Slashdot a subpoena to tie your posts to your IP.
He probably thinks this is hot.
A much harder task. I was hired as a tutor by a 90 or so year old guy once, he got a new mac, his first computer ever. It took two training sessions to get the whole "how to move the mouse" thing down, something my son easily learned when he was 3 years old.
Why? Did you think they'd never come out with a new version of X?
It's stilly to rely on a directory named for a version of a program unless you want to update your software every time a new version comes out.
Personal firewalls do provide an important service that most don't appreciate, a personal level of egress filtering, based on applications rather than packets or ports.
This sort of thing would be valuable even on more secure OS's like Linux or BSD. I'm not sure if any are available, but I know of none installed or enabled by default.
And a key difference: PDF is an open format. Yes, it's owned by Adobe, but the (complete!) specifications are released under a very permissive license that allows pretty much anyone to write a complete implementation to read or write the format.
Adobe reader remains the default reader for many people not because of IP games and threats, but because it is the most complete implementation of the PDF specification currently. This is the way it should be.
Yes, Adobe has played stupid IP games in the past, but PDF and PS are two things that they have done right.
It's worth having, but it's worth having for the $60 a year it used to be. The thing worth having is the updates. The $179 doesn't get you any support, period. Only updates.
The $179 doesn't get you any support.
It only gets you updates.
TURN OFF THE PC.... THROW THE MONITOR OUT THE WINDOW.
I don't think the cord will reach that far.
Besides, what about when I need to put a CD in. I'd have to walk all the way into the house to do that.
When I bought my house, I figured I'd get the low end model, since I thought that in 12 months, a house that was twice as big with twice the features would be out for about the same price.
Sigh.
Maybe, but only in the sense that someone who paints portraits of lots of boats gets familiar with the different parts of a boat. That painter will never learn how a diesel engine works from painting portraits of boats.
Put another way, a "real" AI would make a good chatterbot, but a good chatterbot is not too likely to ever become a real AI.
208 vac is a manifestation of a 3 phase system, 120V to the ground, 208 volts between legs.