 Tube speed

ID: tube-speed

Codex  0 Created 2026-09-24 Updated 2026-11-05

The tube speed combines sound and Alfvén speeds according to

v_{T}^{2} = \frac{v _{s}^{2} v _{A}^{2}}{v _{s}^{2} + v _{A}^{2}} .

It is smaller than both constituent speeds.

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