"N:dlzc D:aol T:com (dlzc)" wrote
...
"El Enrrabadore-mor" wrote in message
...
...
Any comments welcome.

http://hermes.physics.adelaide.edu.a...eleration.html
http://hermes.physics.adelaide.edu.a...igid_disk.html

I've read the links. Let me tell you that my horse dung
detector exploded due to overload.
Both are total nonsense.

The first article blames on rapidity.
What is rapidity?

The second, besides all excuses made, says that:
quote:
"Einstein doesn't give an explicit formula for the spacetime
metric of the rigid spinning disk, but here's one obvious
candidate (assuming the angular speed is omega): "
Tell me please, is it d(theta squared), or the square of
d(theta)?
Also:
"The events along a particle's worldline are parametrized
by 'tau'."
Since worldlines are time like curves in spacetime, the
equation given:
d(tau)^2 = dt^2-dz^2-dr^2-r^2d(theta)^2/(1-r^2omega^2)
not even meets simple dimension requirements.
Some terms have time dimension and others lenght
dimensions, mixed, and cannot be a valid equation.
Only a fool buys that.



David A. Smith