The document proposes a unified theory combining special relativity and the ether theory by considering that fluids are relative and relativistic. It suggests that at relativistic speeds, space can be compressed into a fluid due to length contraction effects, unifying concepts of buoyancy, ether, and relativity. An object moving at near light speed could experience the surrounding "space" as a dense fluid, similar to how ships float in water.

1. The special relativity and the fluid.
The Special theory of relativity and theory of ether can be unified in a single theory, if we
consider that fluids are relative and relativistic.
Faisal Rahman
Abstract: Air is equivalent to water because Aerodynamics and hydrodynamics have equal from
of equation. Air can be transformed into water and so a plane can be thought as a ship.
Air can be compressed to form liquid by means of relativistic effect,. This will cause volume
(Length) contraction and mass increase effect in a vessel due to density change.
The void can be thought as fluid and 0 gravity as buoyancy. So space shuttle can be equivalent to
a ship.
Relativity of Fluids: To an observer air is equivalent to water because equations of
aerodynamics are equivalent to hydrodynamics .
Air =water because Aerodynamics = Hydrodynamics.
For example , The Bernoulli principle can be applied both to the air and the
water.
Suppose a fish swimming in a completely invisible fluid ,from a view point
of an observer who is in a different frame of reference it can be seen as a fish flying in air.

2. An air plane flying in air can be seen as a ship swimming in an invisible
water from a different frame of reference. Only point is water is denser than air , so the plane can
reduce its volume (length) and increase its mass.
It may look something like a flying submarine, I guess.
Relativistic Effect:
Now imagine that a frame full of air, with a plane in it , accelerated near speed of C
,due to the length contraction effect the air will be compressed into liquid. As the density of
fluid increases the volume of the plane can be reduced , L=L`.(1-v2-c2)1/2 and the mass can be
increased M= m/(1-v2-c2)1/2 , , so the plane now may look like a ship. This explains why the
Lorentz transformations would occur ,this happens because fluids are relative.
So due to the relativistic effect a ship can fly in air. This unifies Archimedes principle with
Relativity.
The Void:

3. Imagine a frame with an invisible fluid in it , a body floating inside it can look like a body
levitating in an inertial frame in void.
So , Void = Buoyancy.
Then , Space = Ocean.
Therefore, Space shuttle = ship.
The Ether: Assume a frame, with full of void , accelerated near speed C. The space will be
compressed to form fluid.
Space + Length contraction effect = Ether.
To an observer travelling in speed C , the distance between the Earth and the moon will be
contracted according to beta factor. But this contracted space will become fluid.
How space can change into Mass:
Suppose 2 rocket approaching each other in speed C . Their total velocity is
C+C=C. then where the extra velocity will go ? traditional explanation is E=mc2 .
But it can have a different interpretation, Velocity=distance/time. So the kinetic energy can be
transformed into Space or distance.
Then we write E= dc2 .
Then again E=mc 2.
So , mc2 =dc2 , the space can become mass, a fluid, namely Ether.
In general relativity:
a fluid solution is an exact solution of the Einstein field equation in which the gravitational field
is produced entirely by the mass, momentum, and stress density of a fluid. So mathematically the
space can be thought as fluids.

4. Reference to mythology :
In Mythology there are stories of men who went to the moon aboarding a wooden ship , this
may not be all unscientific.
The moon craters can become real seas to a relativistic space traveler.
Conclusion:
This paper shows that theory of relativity can be unified with the theory of Ether. At a relativistic
velocity space will become fluid. This change of density causes the length contraction and mass
increase effect. This is the theory of the relativistic fluid.
The dialectic between Einstein and Lorentz can be resolved, after all!
References:
 Albert Einstein (1905) "Zur Elektrodynamik bewegter Körper", Annalen der Physik 17:
891; English translation On the Electrodynamics of Moving Bodies by George Barker
Jeffery and Wilfrid Perrett (1923); Another English translation On the Electrodynamics
of Moving Bodies by Megh Nad Saha (1920).
 Tom Roberts and Siegmar Schleif (October 2007). "What is the experimental basis of
Special Relativity?". Usenet Physics FAQ. Retrieved 2008-09-17.
 Albert Einstein (2001). Relativity: The Special and the General Theory (Reprint of 1920
translation by Robert W. Lawson ed.). Routledge. p. 48. ISBN 0-415-25384-5.

5.  Richard Phillips Feynman (1998). Six Not-so-easy Pieces: Einstein's relativity,
symmetry, and space–time (Reprint of 1995 ed.).
Basic Books. p. 68. ISBN 0-201-32842-9.
 Sean Carroll, Lecture Notes on General Relativity, ch. 1, "Special relativity and flat
spacetime," http://ned.ipac.caltech.edu/level5/March01/Carroll3/Carroll1.html
 Wald, General Relativity, p. 60: "...the special theory of relativity asserts that spacetime
is the manifold ℝ4 with a flat metric of Lorentz signature defined on it. Conversely, the
entire content of special relativity ... is contained in this statement ..."
 Rindler, W., 1969, Essential Relativity: Special, General, and Cosmological
 Edwin F. Taylor and John Archibald Wheeler (1992). Spacetime Physics: Introduction to Special
Relativity. W. H. Freeman. ISBN 0-7167-2327-1.
 Wolfgang Rindler (1977). Essential Relativity. Birkhäuser. p. §1,11 p. 7. ISBN 3-540-07970-X.
 Einstein, Autobiographical Notes, 1949