TomGee wrote:
TERRORIST ALERT!! This moron sends your replies to alt. moron.


Dirk Van de moortel wrote:
"TomGee" wrote in message oups.com...

Dirk Van de moortel wrote:
"TomGee" wrote in message oups.com...
Worms doesn't know, that's why he sent you to a website. Spacetime is
a fictional place invented as a math construct so that we can calculate
the motion of objects through time.

According to Einsein, every object has a so-called "world line" which
indicates the object's past, current, and future position wrt its
motion through the universe.

This has nothing whatsoever to do with Einstein.


So you say.


A wordline is just a way of describing the path of an object by
giving its place as a function of time.


That's exactly what I said when I called it a math construct and not a
real place. Apparently you're having a problem with what is being
said.


Example:
{ x = 0
{ y = v0 cos(pi/3) t
{ z = v0 sin(pi/3) t - 1/2 g t^2
are the parametric equations of the wordline of a bullet, shot in the
y-direction with initial speed v0, tilted to an angle of 60 degrees
and where the acceleration due to gravity is given by g.

The start of the bullet at time t=0 is given has (x,y,z) = (0,0,0),
So in the coordinate system that we have chosen, this event in
spacetimes gets the coordinates (t,x,y,z) = (0,0,0,0).

This way the past, present and future of an idealized point-object
is described by its worldline.

The set of all possible events happening at all places and at all
possible times is called spacetime.
Since in this spacetime one needs 4 numbers to describe events,
we call it 4-dimensional.


And a set of anything is a math construct, is it not? Arithmetic, like
2+2=4. Not a real place, location, and not real, just a set of real
numbers. Does not exist adjacent nor parallel to nor out in the space
of our universe. It is a figment of the mind - a math construct.


None of this has anything to do with relativity or with Einstein.
This could be lesson 1 in every elementary physics course.


So what if it doesn't, even though that's your own opinion? Does that
make it any more real and existing somewhere other than in our minds or
as a graph or as a set of numbers?

It shows what a stupid and ignorant pig you are.
Isn't that sufficient?
http://users.pandora.be/vdmoortel/di...heOnlyWay.html
http://users.pandora.be/vdmoortel/di.../SmackDab.html
http://users.pandora.be/vdmoortel/di...bles/CRAP.html
http://users.pandora.be/vdmoortel/di...elescopic.html
http://users.pandora.be/vdmoortel/di...oRestMass.html
http://users.pandora.be/vdmoortel/di...reatMinds.html
http://users.pandora.be/vdmoortel/di...mbles/FoR.html


Pot. Kettle. Black.

xxein: Oh, c'mon Tom. Do you really want to pick on a kid who just
relates to his cubscout handbook?

"Daddy, why did the human race go extinct in the year 2005???"

"Why, Lil darling, it was because of all the rudeness in sci.physics.
Instead of them pursuing cybernetic comfortable survival, they spent
all thier time showing off how they were raised by chickens. They
cudda been contenders! Oh, well, back to Beta Lyrae 7, Lil darling,
nothing of interest for us here. What a shame."

In the olden days, x, kids were innocent. Today, they kill, rape,
steal, abuse drugs, and terrorize us just like grownups.

So I guess my answer is, a reluctant yes.

TomGee wrote:
PD wrote:
TomGee wrote:
Worms doesn't know, that's why he sent you to a website. Spacetime is
a fictional place invented as a math construct so that we can calculate
the motion of objects through time.

According to Einsein, every object has a so-called "world line" which
indicates the object's past, current, and future position wrt its
motion through the universe.

Unroll a paper tape as you walk and mark it every 10 seconds as it
unwinds. Congratulations. You just make a world line. No math construct
there, Tom.


How stupid is it when you think that is a world line? How stupid is it
when you don't even know what a math construct is?


I'm in a room that is 10' by 12' by 14'. Is the central 2'x3'x5' block
of space a math construct or is it really there?

It's a shame that such a high-rated physicist (as you rate yourself)

"high-rated"? Please quote where I said that.

has no clue as to what constitutes a math construct.

It's your jargon. I was asking a question. It's a shame when someone
uses a pet phrase or a bit of jargon and then ridicules others when
they ask him what the heck he's talking about.

Somewhere along
your educational trail someone must have explained to you the
limitations of mathematics in relation to conclusions about reality.

0 wavelength at constant c.
is spacetime.
photons pass evrything at c .
even if the wavelenth is 0.

TomGee wrote:
In the olden days, x, kids were innocent. Today, they kill, rape,
steal, abuse drugs, and terrorize us just like grownups.

So I guess my answer is, a reluctant yes.

xxein: I grant you special permission for this case only. After all
this is how we select presidents, isn't it?

Its an epedemic. And we can't contain it.

wrote in message
oups.com...
Its an epedemic. And we can't contain it.


What is?

TomGee wrote:
In the olden days, x, kids were innocent. Today, they kill, rape,
steal, abuse drugs, and terrorize us just like grownups.

So I guess my answer is, a reluctant yes.

In the olden days, they did the same with their parents.

-Aut

"T Wake" wrote in message
...

wrote in message
oups.com...
Its an epedemic. And we can't contain it.


What is?

The 'epidemic' is the proliferation of stupid posters who strip all
contextual cues from their replies and who use pronouns without referents so
that rational people haven't got a clue what the morons are going on about.


Tom Davidson
Richmond, VA