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Anonymous Poster

Nobody form no where.

12/23/2007 6:58 AM

Is it true copper will conduct heat at the speed of light?

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#1

Re: Nobody form no where.

12/23/2007 7:18 AM

When I turn on the hot tap in my kitchen it takes a few seconds for it to get hot. I guess the answer is 'No'. Even electrons move very slowly in wiring (copper or any other type), the apparent speed is analogous to cars shunting each other ; http://amasci.com/miscon/speed.html

Have I missed the point of your question ?

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Anonymous Poster
#7
In reply to #1

Re: Nobody form no where.

12/24/2007 12:56 PM

Well Kris, I'll will have to think about this for a bit.

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#8
In reply to #7

Re: Nobody form no where.

12/24/2007 2:51 PM

Ouch !

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#2

Re: Nobody form no where.

12/23/2007 7:27 AM

No,

Doesn't your experience of the real world tell you this? Have you never stirred a cup of hot liquid with a cold spoon and felt the time it takes to warm up?

It doesn't even conduct electricity at at the speed of light, or transmit information that fast.

Have you any concept how fast light travels? Maybe a few quick sums may help get an appreciation of it.

Do you understand how big a million is...? We don't even live a million hours .

Del

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#3
In reply to #2

Re: Nobody form no where.

12/23/2007 7:41 AM

We get 40 million or so minutes if we're lucky . *****, there goes another one !

Here goes another ! http://www.youtube.com/watch?v=H_GmuIHL_EM

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#4

Re: Nobody form no where.

12/23/2007 1:07 PM

Who was dumb enough to tell you that.

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#5

Re: Nobody form no where.

12/23/2007 11:51 PM

No.

The speed of heat conduction varies:

  1. Thermal Mass of the hotter object
  2. Thermal Mass of the cooler object.
  3. Thermal Conductivity of the hotter object
  4. Thermal Conductivity of the cooler object
  5. Cross-Sectional area of the heat transfer, directly in line with the heat transfer from hotter object to cooler object
  6. Temperature of the hotter object
  7. Temperature of the cooler object
  8. Material of the hotter object
  9. Material of the cooler object

There are still more Variables, but those are the most significant.

If you are interested, refer here:

http://www.youth.net/nsrc/ejournals/ejou031.html#anchor998660

That should get you started.....

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#9
In reply to #5

Re: Nobody form no where.

12/25/2007 9:53 AM

There is a notion called thermal difusibility which indicates how fast heat can be diffused in a material. It does not depend on temperature directly on not on the mass or the Cross sectional areas. It depends on temperature ONLY though its influence on thermal conductivity and capacity to accumulated heat.

I have the feeling that it is a confusion between thermal "speed" of diffusion and quantity of heat transfered.

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#6

Re: Nobody form no where.

12/24/2007 12:19 AM

Maybe we have all mis-interpreted this question. My local coppers will turn up at a speed which is inversely proportional to the severity of 'heat' or 'crime' as it's usually known. Pending further info I am still baffled by this one. My only other thought is that the coppers in my pocket do seem to disappear quickly, as if they're shouting " spend me, spend me Kris !"

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