A Derivation of Three-Dimensional Inertial Transformations

The derivation of the transformations between inertial frames made by Mansouri and Sexl is generalised to three dimensions for an arbitrary direction of the velocity. Assuming lenght contraction and time dilation to have their relativistic values, a set of transformations kinematically equivalent to special relativity is obtained. The ``clock hypothesis'' allows the derivation to be extended to accelerated systems. A theory of inertial transformations maintaining an absolute simultaneity is shown to be the only one logically consistent with accelerated movements. Algebraic properties of these transformations are discussed. Keywords: special relativity, synchronization, one-way velocity of light, ether, clock hypothesis.Comment: 16 pages (A5), Latex, one figure, to be published in Found. Phys. Lett. (1997

Molar conductance of aqueous solutions of sodium, potassium, and nickel trifluoromethanesulfomate at 25°C

The electrical conductivities of aqueous solutions of NaCF3SO3, KCF3SO3, and Ni(CF3SO3)2 have been measured at 25°C in the concentration range 1 to 25×10-3 mol-dm-3. The data approach the Onsager limiting law at low concentrations, leading to a limiting molar ion conductivity for the CF3SO-3 ion of 44.5±0.2 S-cm2-mol-1, based on standard values for the cations. Using a simple size parameter for unsymmetrical polyatomic ions, based on the ion geometry, it is shown that the well known empirical relation between the molar conductivities of symmetrical ions and their radii can be extended to include certain polyatomic anions including CF3SO-3. The results suggest that the CF3SO-3-ion is either a weak structure breaker in aqueous solution or neutral in this respect