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Posted
  On 3/24/2015 at 7:32 PM, Thorham said:

Right, you mean length. Thought you meant the subjective tall (I'm tall compared to a mouse, but short compared to an elephant).

We can do that, too. (And "a mouse is small" is subjective, but "a mouse is small compared to an adult human" is not.)

 

 

  On 3/24/2015 at 7:32 PM, Thorham said:

Asking what length is, is valid. For items made of atoms, it's more or less the number of atoms along a straight line between the two measuring points... or something like that ;) The involved 'stuff' is atoms.

The standard has been laser light for some time now.

 

  On 3/24/2015 at 7:32 PM, Thorham said:

In the case of electric charge, it's an abundance or shortage/absence of electrons. Here the 'stuff' that's involved is electrons.

Or protons, or a multitude of other charged particles. All of which share the property of being charged. Charge does not exist by itself

 

 

  On 3/24/2015 at 7:32 PM, Thorham said:

Now, how do we answer this for magnetism? What's the involved 'stuff' here?

 

It's charge in motion, which leads you to relativity.

 

 

  On 3/24/2015 at 7:32 PM, Thorham said:

Perhaps, but what if some of those questions can be answered? You're obviously (probably) going to hit a wall at some point. A point where you can't go farther because nature won't let you, or because you've simply arrived at the end. Until that happens, these questions must be asked.

And with charge, we've hit that wall.

Posted (edited)
  On 3/24/2015 at 7:59 PM, swansont said:

We can do that, too. (And "a mouse is small" is subjective, but "a mouse is small compared to an adult human" is not.)

 

The point is that I thought you meant the subjective tall, which depends on your viewpoint, while length does not, because it depends on some reference unit.

 

  On 3/24/2015 at 7:59 PM, swansont said:

The standard has been laser light for some time now.

That's probably easier than counting atoms :)

 

  On 3/24/2015 at 7:59 PM, swansont said:

Or protons, or a multitude of other charged particles. All of which share the property of being charged. Charge does not exist by itself

 

Right, but what causes the charge? Is it simply part of the way a particle behaves?

 

  On 3/24/2015 at 7:59 PM, swansont said:

And with charge, we've hit that wall.

 

Impossible to prove. That's the problem with that wall. Is there nothing more? Perhaps there is, but can we get to it? If we can get to it, how hard is that going to be? Is it going to take 10 years? A 100? A million?

 

 

Anyway, I should know better than to start arguing about physics, and from now on I'm going to stick to something I know: Computer programming.

Edited by Thorham
Posted
  On 3/24/2015 at 9:36 PM, Thorham said:

Anyway, I should know better than to start arguing about physics

 

The trouble is, this isn't physics. Until there is a reason to think that charge is not fundamental or a testable hypothesis about the nature of charge, these sort of questions are metaphysics.

Posted
  On 3/24/2015 at 9:45 PM, Strange said:

 

The trouble is, this isn't physics. Until there is a reason to think that charge is not fundamental or a testable hypothesis about the nature of charge, these sort of questions are metaphysics.

 

Yes, and that's another problem for me. Science can't answer certain questions, including the ultimate question, namely: What is the true nature of reality?

 

So I'm going to stick to programming. Much easier :)

Posted (edited)
  On 3/24/2015 at 10:04 PM, Thorham said:

 

Yes, and that's another problem for me. Science can't answer certain questions, including the ultimate question, namely: What is the true nature of reality?

 

So I'm going to stick to programming. Much easier :)

 

Programming is like Puzzle Solving,

 

A purely Software Process always having to run on a Hardware like Computer or Human Brain etc.

 

Perhaps the best software is to create an Intelligent Robot with all Human Prowess with Possibilities of Enhancement/Expansion. Also able to duplicate a Living Human's Knowledge/Memory/Brain so that Death can be grossly defeated !

 

>>>>>>>>>>>>>>>>>>>>>>>>>

 

PS : Another interesting and useful Program you can create is an Embedded Software on the TV Remote which will automatically switch the next Channel on the Favotite List as soon as an Ad is started or is going on !

Edited by Commander
Posted
  On 3/24/2015 at 8:10 AM, Strange said:

 

There is no evidence that charge is made of anything else. It appears to be one of the fundamental properties of matter.

Consider this :

 

Charge might be just a Property of Matter with Mass.

 

Just like Heat radiates from a Higher Temp to Lower Temp [Temperature indicating Heat Potential ]

 

Electric Charge might flow from higher Potential to lower Potential [ though it is presently called Negative ]

 

We may need to look at it in a different angle.

Posted
  On 3/25/2015 at 10:40 AM, Commander said:

Consider this :

 

Charge might be just a Property of Matter with Mass.

 

Just like Heat radiates from a Higher Temp to Lower Temp [Temperature indicating Heat Potential ]

 

Electric Charge might flow from higher Potential to lower Potential [ though it is presently called Negative ]

 

That sounds about right.

Posted (edited)
  On 3/25/2015 at 10:42 AM, Strange said:

 

That sounds about right.

 

Thank you

 

I am thinking how Magnetism will get interlinked into it.

Edited by Commander
Posted
  On 3/25/2015 at 10:44 AM, Commander said:

I am thinking how Magnetism will get interlinked into it.

 

When charges move, you get magnetism. It is just a different "perspective" on charge.

  • 3 months later...
Posted

Maybe I should start a new topic for this, but the wealth of knowledge exhibited here is too awesome. :)

  1. Many introductory materials talk about (and use in illustrations) 'lines of force' when covering magnetism. Is that an accurate concept, or a fiction for illustrative purposes? Are there actually discrete force lines, or is it a continuous field?
  2. I'm looking for materials that, when used as the core of a coil, will strongly enhance the coil's magnetic effects. However, I'm looking for materials that will retain as little as possible of any induced magnetism -- and other materials that will retain as much as possible. I don't know what terms to use nor where to look; can anyone provide we with some links or pointers?

Thanks very much!

  • 3 weeks later...
Posted

1. Continuous

2. Soft magnetic versus hard magnetic.

 

Transformer laminations are soft magnetic. Some more expensive materials are even softer, like Permalloy.

 

As much as possible: this is called a permanent magnet. The usual champion presently is neodymium (in fact Nd-Fe-B) but precisely because it's hard magnetic, it's (really) difficult to magnetize, typically by capacitor discharge in the megawatt region. You buy them already made.

  • 1 month later...
Posted
  On 3/25/2015 at 10:47 AM, studiot said:

Are we done with the original topic?

 

Good Question !

 

+1 for you

  On 3/25/2015 at 10:49 AM, Strange said:

 

When charges move, you get magnetism. It is just a different "perspective" on charge.

Nice +1

  On 3/20/2015 at 3:38 PM, studiot said:

 

 

Be aware of the difference between force and energy.

 

Magnets do not have energy flowing into or out of them.

 

Magnetism is a force. Exerting a force may or may not involve energy.

 

For example the Earth continues to exert a force on you through gravity, but no energy flows into or out of the Earth, unless you fall out of the sky.

 

In the same way a magnet may cause another body to move, doing work in the process.

But something moves or holds the magnet.

 

This is like poking something with a stick so it moves or drawing it along with a string.

Either way the stick or string exerts a force on the object, but something else has to push or pull the other end.

 

If the object does not move then the force can remain exerted till kingdom come and no work is done, so no energy flows.

 

Good point +1

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