Changes in Version 3 (June 2026): This version corrects the longitudinal acoustic velocity to vL ≈ 9. 49 × 1013 m/s for consistency with later manuscripts. It also clarifies that the fluid tether is a persistent structure while the entangled pair remains isolated, with rapid collapse occurring only after measurement. A preferred frame (CMB rest frame) is now explicitly declared. Description: In previous work, the Electron Flow Model (EFM) replaced the mystical non-locality of quantum entanglement with a deterministic, hydrodynamic conduit known as the "Fluid Tether". However, approximating this tether as perfectly incompressible inadvertently implies an infinite speed of sound, creating a critical tension with relativistic causality. This paper resolves that paradox by computationally modeling the finite compressibility of the Quantum Vacuum Flux. By applying the fluid-dynamic ratio of localized bulk modulus to fluid density (vL = K/), we mathematically demonstrate that within the hyper-compressed vortex core of a fluid tether, longitudinal acoustic shockwaves propagate at superluminal speeds vastly exceeding the transverse velocity of light (c). By calculating the finite, non-zero propagation delay (t > 0) of these acoustic waves, we prove that Subatomic Torque Transfer is strictly causal. Furthermore, this derivation formally establishes a Dual-Speed-Limit Paradigm for the Cosmos, permanently preserving local realism while simultaneously explaining why entanglement appears instantaneous to legacy electromagnetic instrumentation. Key Findings it propagates mechanically via atomic-scale particle collisions. Superluminal Acoustic Waves (vL c): The mechanical synchronization of entangled particles relies on longitudinal acoustic waves traveling through a hyper-compressed core, achieving velocities computationally derived at 10⁵ c. Preservation of the No-Signaling Theorem: The superluminal velocity does not violate macroscopic Relativity. The fluid tether is highly fragile, collapsing on the order of attoseconds to zeptoseconds. Macroscopic measurement shatters the vortex, making it physically impossible to transmit arbitrary macroscopic data or construct a reverse-signaling loop. The Dual-Speed-Limit Paradigm: The constant c remains the unbreakable speed limit for transverse electromagnetic waves traversing the baseline vacuum. vL represents the localized, single-use superluminal capacity of longitudinal acoustic waves. Included Resources: Appendix A contains the complete, reproducible Python mathematical engine used to calculate the superluminal longitudinal velocity and its strictly causal (t > 0) propagation delay. The Unified Fluid Cosmos Framework: This paper serves as Manuscript 15 Version 3 in the comprehensive series, Marabūt's Theory of Gravity. It presents the Electron Flow Model (EFM), a generative, fluid-dynamic framework designed to fundamentally replace Albert Einstein's General Relativity and standard Quantum Mechanics. The EFM shatters classical circularity with a single, undeniable foundational premise: Gravity is Pressure, not curvature, and not an intrinsic mass property. Published Manuscripts in this Series: Manuscript 01: The Push-Pull Mechanics of Vacuum Flux (The Foundational Framework) — https: //doi. org/10. 5281/zenodo. 18874694 Manuscript 02: Resolving the Weyl Potential Anomaly — https: //doi. org/10. 5281/zenodo. 19784494 Manuscript 03: Mechanistic Resolution of Jet Deflection in Cygnus X-1 — https: //doi. org/10. 5281/zenodo. 19790983 Manuscript 04: Quantum Mechanics of Stellar Chain Reactions and EVGS Formation — https: //doi. org/10. 5281/zenodo. 19801398 Manuscript 05: The Heliospheric Grand Data Matrix — https: //doi. org/10. 5281/zenodo. 20128776 Manuscript 06: Fluid-Dynamic Reinterpretation of Gravity, Black Holes, and Gravitational Waves — https: //doi. org/10. 5281/zenodo. 20129518 Manuscript 07: Fluid-Dynamic Reinterpretation of the Kinematic Sunyaev-Zeldovich Effect — https: //doi. org/10. 5281/zenodo. 20130259 Manuscript 08: Transcending the Singularity — Electron Void Gravitational Spheres — https: //doi. org/10. 5281/zenodo. 20130801 Manuscript 09: The Final Parsec Problem Solved — https: //doi. org/10. 5281/zenodo. 20134048 Manuscript 10: The Illusion of the Singularity — https: //doi. org/10. 5281/zenodo. 20135533 Manuscript 11: The Illusion of Dark Energy — https: //doi. org/10. 5281/zenodo. 20149141 Manuscript 12: The Illusion of Dark Matter — https: //doi. org/10. 5281/zenodo. 20171372 Manuscript 13: The Illusion of Spacetime — https: //doi. org/10. 5281/zenodo. 20172281 Manuscript 14: The Illusion of Spooky Action — https: //doi. org/10. 5281/zenodo. 20173191 Manuscript 15: The Superluminal Mechanics of the Quantum Vacuum — https: //doi. org/10. 5281/zenodo. 20173755 Manuscript 16: Empirical Validation of the Electron Flow Model — https: //doi. org/10. 5281/zenodo. 20271062 Manuscript 17: Confronting the Cosmic Microwave Background — https: //doi. org/10. 5281/zenodo. 20483713 Manuscript 18: Resolving the CMB Power Spectrum — https: //doi. org/10. 5281/zenodo. 20493520 Manuscript 19: The Foundation of Stellar Dynamics — https: //doi. org/10. 5281/zenodo. 20500168 Manuscript 20: Resolving the Black Hole Information Paradox — https: //doi. org/10. 5281/zenodo. 20535631 Manuscript 21: Hydrodynamic Shockwaves and Wave-Particle Duality (Current Paper) — https: //doi. org/10. 5281/zenodo. 20620456 Data & Code Availability: To accompany this manuscript, we have open-sourced the complete Python mathematical engine and a fully interactive 3D web-based simulation of the EFM Volumetric Profiler. Researchers, developers, and students can visually explore the hydrodynamic vacuum flux across the celestial bodies at: Interactive 3D EFM Volumetric Profiler: https: //marabutmarabut. github. io/Theory-of-Gravity Official GitHub Repository: https: //github. com/MarabutMarabut/Theory-of-Gravity
Marabūt et al. (Wed,) studied this question.
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