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Author Topic:   Some String theory questions.
crashfrog
Member (Idle past 1467 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 16 of 21 (126853)
07-23-2004 2:07 AM
Reply to: Message 15 by Hangdawg13
07-23-2004 1:41 AM


density may be hard to imagine, but think of it like temperature.
How about I think of it as what is is; the amount of mass within a given volume?
Honestly what would prompt you to consider density as a dimension unto itself?
If you have a pool full of unevenly heated liquid and you wanted to know the location and temperature and time of that liquid you would have five dimensions at one point. (x,y,z,t,temp) You could plot all of this at once on a graph for any fixed value of t (give the point a color for temperature).
Given a sufficient number of points, "temp" is redundant - I can figure it out from x,y,z, and t. Since temperature is, after all, nothing more than motion over time.
At any rate I don't really see how this analogy makes a compelling case for treating density as a dimension.

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Replies to this message:
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coffee_addict
Member (Idle past 477 days)
Posts: 3645
From: Indianapolis, IN
Joined: 03-29-2004


Message 17 of 21 (126889)
07-23-2004 4:29 AM
Reply to: Message 16 by crashfrog
07-23-2004 2:07 AM


Agreed.

The Laminator

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Hangdawg13
Member (Idle past 751 days)
Posts: 1189
From: Texas
Joined: 05-30-2004


Message 18 of 21 (127206)
07-23-2004 11:33 PM
Reply to: Message 16 by crashfrog
07-23-2004 2:07 AM


...I had Calc III the semester before last and we carried out integrals to 3 dimensions and beyond. Most of our problems dealing with more than 3 dimensions added a fourth or fifth in the form of temperature or density problems. In my mind it's much easier to imagine this than a hypercube although it might not be relavant to an actual spacial dimension.

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SRO2 
Inactive Member


Message 19 of 21 (127218)
07-24-2004 12:16 AM
Reply to: Message 15 by Hangdawg13
07-23-2004 1:41 AM


Paradox
What you are trying to convey is referred to as a "paradox" in time. Travel into "future" time is not only possible, it can been done. Time travel into the past (at least theoretically) can't be done.

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Christian7
Member (Idle past 249 days)
Posts: 628
From: n/a
Joined: 01-19-2004


Message 20 of 21 (127558)
07-25-2004 9:30 PM
Reply to: Message 19 by SRO2
07-24-2004 12:16 AM


Re: Paradox
Would we percieve time going quicker around us if we slowde down the chemistry in our body.

This message is a reply to:
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SRO2 
Inactive Member


Message 21 of 21 (127559)
07-25-2004 9:36 PM
Reply to: Message 20 by Christian7
07-25-2004 9:30 PM


Re: Paradox
I think it's the opposite. If chemistry speeds up, time would appear slower. A fly probably thinks it lives 70 years.

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