Page 1 of 2

Some Questions

PostPosted: Tue Apr 27, 2010 7:01 pm
by Doc
I was wondering...
And don't really want to take the time to find out...

Is there an "opposite" of electricity...
Besides the obvious "not electricity"...

How do magnets work?

Is it "baloney" or "bologna"?

When you get junk mail about buying a funeral plot...
Are you getting old?

Is surfing really a sport?

doc

Re: Some Questions

PostPosted: Tue Apr 27, 2010 9:08 pm
by riverjetty
Surfing is not a sport, it's a skill. I'm not an athlete, but I can surf, and so can a bunch of drunks I know.

Re: Some Questions

PostPosted: Tue Apr 27, 2010 9:46 pm
by Spent
i just had a big question answered, as i squeezed a big pus-ridden cyst dry from my left tit.
i hope you find the answers to yr questions as satisfying as i just did.

i paid my first visit to the Rose Garden the other day, surfing isn't a sport.

Re: Some Questions

PostPosted: Wed Apr 28, 2010 7:30 am
by WC
surfing is a sport, everyone besides KS is losing.

Re: Some Questions

PostPosted: Wed Apr 28, 2010 11:35 am
by smithgrind
It's baloney if you're talking meat.

It's Bologna if you're traveling through Italy..

surfing is spurt.

Re: Some Questions

PostPosted: Wed Apr 28, 2010 1:11 pm
by pra_ggresion
Is there an "opposite" of electricity...
Besides the obvious "not electricity"...

How do magnets work?


There are four forces; Gravity, Electromagnetic, Weak and Strong Nuclear in order from weakest to strongest.

As of what is known right now, no. Electricity is what electrons do. However what you're really thinking of is, 'Is there an opposite to an electric field?' Still no but, a photon is a carrier particle (the movement of an electron dictates the emission and absorption of a photon) for the electromagnetic force of which, an electric field is one component and a magnetic field is the other. As a photon propagates the E-field is 'neutral' with the magnetic field, usually denoted, B-field(since they're perpendicular has the mathematical property of linear independence). All matter we experience has both of these.

If a material is 'isotropic' then it means that the structure is the same in every direction. A magnet most commonly iron is not isotropic. The lattice structure is such that little sections, chalk full of compass needs align in a particular direction called domains. The sum total of these domains point in a particular direction defined as north or +. B-Fields have the property of what ever starts has to end, or since there is a + the opposite direction is a -. The E-fields, if they do not sum to 0 then there is current also known as electricity.

In the presence of an E or B field, the domains with realign themselves to be parallel if B field, perpendicular if in the E field. i.e. a compass needle is aligning itself with the magnetic field

There are three classification of magnets:

ferromagnetic, what you're familiar with
Paramagnetic, only magnetic in the presence of a B field. Like from a ferromagnet
and Diamagnetic is like a paramagnet but opposite?


Any questions?

Re: Some Questions

PostPosted: Wed Apr 28, 2010 3:48 pm
by Gazsurf
I'll get back to you with questions....... once I pick up all the pieces of my exploded brain. :roll:

Re: Some Questions

PostPosted: Wed Apr 28, 2010 4:08 pm
by Doc
Whoa...

doc

Re: Some Questions

PostPosted: Wed Apr 28, 2010 5:43 pm
by holddown
What pra was trying to say is that you can make a magnet with electricity and you can make electricity with a magnet.

But that doesn't make them opposites.

Re: Some Questions

PostPosted: Thu Apr 29, 2010 10:46 am
by WC
i thought the opposite of electricity is plastic

but then i found this:

http://www.sciencedaily.com/releases/20 ... 111514.htm

Re: Some Questions

PostPosted: Thu Apr 29, 2010 12:57 pm
by pra_ggresion
You mean to say electrically conducting.

All materials can be classified as

Conductors Gold
Semi-conductors Silicon
Insulators most plastics and ceramics

and then there's

Super Conductors Helium at -270 celsius!

Re: Some Questions

PostPosted: Thu Apr 29, 2010 4:10 pm
by bluesilver
The opposite of electricity is death.

Re: Some Questions

PostPosted: Fri Apr 30, 2010 9:19 pm
by Ceedog
pra_ggresion wrote:You mean to say electrically conducting.

All materials can be classified as

Conductors Gold
Semi-conductors Silicon
Insulators most plastics and ceramics

and then there's

Super Conductors Helium at -270 celsius!


Or super insulators like SF6

Re: Some Questions

PostPosted: Sat May 01, 2010 2:53 am
by navier-stokes
Ceedog wrote:
pra_ggresion wrote:You mean to say electrically conducting.

All materials can be classified as

Conductors Gold
Semi-conductors Silicon
Insulators most plastics and ceramics

and then there's

Super Conductors Helium at -270 celsius!


Or super insulators like SF6



while we are at it what about topological insulators?

I prefer to just break things into dielectrics and conductors.... but then I just try to keep it simple.

Re: Some Questions

PostPosted: Sat May 01, 2010 12:39 pm
by pra_ggresion
Indubitably, if you're a strictly Maxwell equation sort of guy.

Aren't topological insulators a mix of the other ones.