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Rigidity versus SR: "sound faster than light"



 
 
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  #1  
Old January 13th 07 posted to sci.physics,sci.physics.relativity
Seven Seas Oscirius
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Posts: 176
Default Rigidity versus SR: "sound faster than light"

The rigidity -- gas pressure -- in some stars becomes so great that the
speed of sound would be greater than c.

Imagine the outcry on these groups if someone said the kinetic energy
of some 1kg masses is so great that they would go faster than light!

The situation in neutron stars saved by general relativity, not the
special theory (though Einstein would not have been happy with it):
when v(sound) = c, complete, irresistible (like me) gravitational
collapse occurs.

Einstein knew that rigidity was difficult to fit into SR, and it
concerned him in the first years after his annus mirabilis ....

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  #2  
Old January 13th 07 posted to sci.physics,sci.physics.relativity
Paul Cardinale
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Default Rigidity versus SR: "sound faster than light"


Seven Seas Oscirius wrote:
The rigidity -- gas pressure -- in some stars becomes so great that the
speed of sound would be greater than c.


False.

  #3  
Old January 13th 07 posted to sci.physics,sci.physics.relativity
N:dlzc D:aol T:com \(dlzc\)
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Posts: 1,041
Default Rigidity versus SR: "sound faster than light"

Dear Seven Seas Oscirius:

"Seven Seas Oscirius" wrote in
message
oups.com...
The rigidity -- gas pressure -- in some stars becomes
so great that the speed of sound would be greater than
c.


The gas pressure can become so great that gas becomes solid. And
the speed of sound in a solid is c.

Imagine the outcry on these groups if someone said the
kinetic energy of some 1kg masses is so great that they
would go faster than light!


Even matter at 25 million degrees K is not moving all that fast,
pressure or not. Pressure only deals with distance between mass
centers.

The situation in neutron stars saved by general relativity,
not the special theory (though Einstein would not have
been happy with it): when v(sound) = c, complete,
irresistible (like me)


Good to know you won't be breeding.

gravitational collapse occurs.

Einstein knew that rigidity was difficult to fit into SR,
and it concerned him in the first years after his annus
mirabilis ....


Demformable solid behavior was very well known centuries before
Einstein. He had no problems with it.

David A. Smith


  #4  
Old January 16th 07 posted to sci.physics,sci.physics.relativity
Seven Seas Oscirius
external usenet poster
 
Posts: 176
Default Rigidity versus SR: "sound faster than light"


N:dlzc D:aol T:com (dlzc) wrote:

Dear Seven Seas Oscirius:

"Seven Seas Oscirius" wrote in
message
oups.com...
The rigidity -- gas pressure -- in some stars becomes
so great that the speed of sound would be greater than
c.


Gribbin and Davies said it in The Matter Myth. So it must be true.
:-^)


The gas pressure can become so great that gas becomes solid. And
the speed of sound in a solid is c.

Imagine the outcry on these groups if someone said the
kinetic energy of some 1kg masses is so great that they
would go faster than light!


Even matter at 25 million degrees K is not moving all that fast,
pressure or not. Pressure only deals with distance between mass
centers.

The situation in neutron stars saved by general relativity,
not the special theory (though Einstein would not have
been happy with it): when v(sound) = c, complete,
irresistible (like me)


Good to know you won't be breeding.


It's clear you have none.


gravitational collapse occurs.

Einstein knew that rigidity was difficult to fit into SR,
and it concerned him in the first years after his annus
mirabilis ....


Demformable solid behavior was very well known centuries before
Einstein. He had no problems with it.

David A. Smith


 




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