In addition, objects don't have a meaningful absolute velocity since there's no single " preferred " reference frame in which light behave properly; you can only talk about objects'velocities relative to other objects.
12.
However, by geometrising gravitation in the theory of general relativity, it seems to me that Einstein reintroduced absolute velocities for moving objects, through the back door as it were, by reifying space-time as a definite manifold.
13.
The concept of an absolute velocity, including being " at rest " as a particular case, is ruled out by the principle of relativity, also eliminating any obvious " center " of the universe as a natural origin of coordinates.
14.
Interpreted a la Glymour, the point is not the naive one that absolute velocity is not measurable-that would be alright-but that it cannot even be computed from measured quantities via any seriously proposed ( let alone well-tested ) hypotheses.
15.
The decrease in the absolute velocity of the fluid across the two rotor blade rows ( R 1 and R 2 ) is due to the energy transfer; the slight decrease in the fluid velocity through the fixed guide blades ( F ) is due to losses.
16.
His criticism was that they lead " to asymmetries which do not appear to be inherent in the phenomena . " Whether one assigns an absolute velocity of zero to a conductor and a non-zero velocity to a magnet, or vice versa, the measurable result ( current ) is the same.
17.
It seems to imply that " absolute velocity is not measurable " is different from " absolute velocity [ . . . ] cannot [ . . . ] be computed from measured quantities " which is nonsense and certainly not something that Einstein believed and it implies that " absolute velocity is not measurable " is an obviously true statement a priori; see Section 16 1 of the " Feynman Lectures on Physics " for a response to that .-- talk ) 11 : 17, 6 August 2009 ( UTC)
18.
It seems to imply that " absolute velocity is not measurable " is different from " absolute velocity [ . . . ] cannot [ . . . ] be computed from measured quantities " which is nonsense and certainly not something that Einstein believed and it implies that " absolute velocity is not measurable " is an obviously true statement a priori; see Section 16 1 of the " Feynman Lectures on Physics " for a response to that .-- talk ) 11 : 17, 6 August 2009 ( UTC)
19.
It seems to imply that " absolute velocity is not measurable " is different from " absolute velocity [ . . . ] cannot [ . . . ] be computed from measured quantities " which is nonsense and certainly not something that Einstein believed and it implies that " absolute velocity is not measurable " is an obviously true statement a priori; see Section 16 1 of the " Feynman Lectures on Physics " for a response to that .-- talk ) 11 : 17, 6 August 2009 ( UTC)
20.
If one considers a moving initial position, or equivalently a moving origin ( e . g . an initial position or origin which is fixed to a train wagon, which in turn moves with respect to its rail track ), the velocity of P ( e . g . a point representing the position of a passenger walking on the train ) may be referred to as a relative velocity, as opposed to an absolute velocity, which is computed with respect to a point which is considered to be'fixed in space'( such as, for instance, a point fixed on the floor of the train station ).
