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If a submarine is zero-buoyant it follows it is the same average density as the water it is suspended within — and therefore has the same gravity when observed
by qubex 11y ago
If a submarine is zero-buoyant it follows it is the same average density as the water it is suspended within — and therefore has the same gravity when observed from an external reference... or am I missing something?
- jofer 11y agoIt has the same average density, but doesn't produce the same gravity anomaly. If the submarine were a perfect spherical shell of denser and lighter sub-shells, everything would cancel out. However, they're not. They're essentially really dense blobs attached to much less dense blobs. You get a gravity anomaly due to the lack of spherical symmetry.
- qubex 11y agoThanks for the clarification. I presume the really dense blob is the reactor and the less dense blobs are the air-filled crew compartments?