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A minimum speed? 
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#1
Apr1003, 02:03 PM

P: 1,954

I wonder, since c presents a maximum speed limit to the universe, is it plausible for there to be a theoretical minimum (and nonzero) speed limit too?
Such a limit would certainly have interesting implications... 


#2
Apr1003, 02:44 PM

P: n/a

This seems vaguely familiar to me though I don't have any serious knowledge of physics. I was thinking that if the electrons themselves slowed down to nil that the gig we know as the universe would be up.
[edit] Ok, I just saw the part about nonzero. Maybe someone would like to explain the details of my post for me? 


#3
Apr1003, 03:49 PM

P: n/a

Well correct me if I'm wrong but.. Heisenberg: ΔxΔp = h/4π so if Δp→0 then Δx doesn't make sense anymore, so there must be some minimum jitternig speeds to prevent this. But I might be wrong...



#4
Apr1003, 06:30 PM

P: 1,954

A minimum speed?
Uh... by non zero I meant no annoying replies saying that you can't get a speed less than zero and stuff like that. I am wondering if there is a minimum speed above zero, or whether there is a theoretical reason why zerospeed, relative to anything, is impossible.



#5
Apr1003, 06:57 PM

P: 499

You would be correct climbhi.
Quantum claustrophobia is what it is referred to. 


#6
Apr1003, 07:06 PM

P: n/a

Could it be something like absolute zero where you can't actually get there except through extrapolation? 


#7
Apr1003, 07:37 PM

P: n/a




#8
Apr1003, 08:22 PM

P: 348




#9
Apr1003, 09:29 PM

P: n/a

Actually in solid state physics, people are often concerned with calculating phonon modes in low dimensional systems. Side Bar: For those of you not in the know... a phonon mode in an array of atoms is analogous to the vibration found in a matrix of balls with each ball attached to its nearest neighbors by springs. There is a lowest energy value a system can have... due to your reasoning. It is refered to as the zero point energy. eNtRopY 


#10
Apr1103, 07:51 AM

P: 406

1/c
seriously though... I don't think such a speed could be said to exist. remember all objects must be at rest with respect to themselves. All other speeds are relative. So zero speed is possible. 


#11
Apr1103, 09:40 AM

P: n/a

All speeds in space are relative therefore it is impossible to determine either a maximum or minimum speed except in relation to an object whose true speed is unknown.



#12
Apr1103, 12:29 PM

P: n/a

eNtRopY 


#13
Apr1103, 07:19 PM

P: n/a




#14
Apr1103, 10:27 PM

P: n/a

But assume that light, originating from the 5th dimension offers our only reference point to absolute motion. Being that we have mass when we are standing still, we must all be moving together at some rate. But due to entropy (no pun intended)... the chaos of the motion defines no absolute direction of motion. As time goes by, it will only become more chaotic, making reaching minimum speed the more difficult, if we can even slow ourselves down somehow.



#15
Apr1203, 03:33 AM

P: 348

The constant exist. The Constant this NOT CHANGEABLE VALUE. Any measured comparatively constant a value will be absolute, not relative. Exactly a constant is a zero point. This obviously. It is difficult to explaine the reason people prefer to stand on head...
Certainly, I am saying about the speed of light "c". 


#16
Apr1203, 04:30 AM

P: 353

Very interesting.
I personally do not see any reason for having a minimum speed, so i believe the minimum speed of any object will be 0. Some quotes ... If [del]p>0 it does not mean that p>0, (therefore it does not mean that v>0) so the HUP will be useless to find any good result in this conversation. 


#17
Apr2303, 12:58 PM

P: 473

Speed is distance/time. Minimum speed is planck length/planck time. Hmm, isn't it like "c"?
I'd add another view. What is speed? motion. What is motion? Interaction. So, zero speed is zero interaction. Now the big one  what does it mean to exist? If two particles never interact, do they exist relative to each other? Isn't stopping to complete standstill equivalent ceasing to exist? Virtual vacuum comes to mind. 


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