Relativistic Archimedes law for fast moving bodies and the general-relativistic resolution of the submarine paradox

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dc.contributor.authorMatsas, George E. A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:56:04Z
dc.date.available2022-04-28T19:56:04Z
dc.date.issued2003-01-01
dc.description.abstractWe investigate and solve in the context of general relativity the apparent paradox which appears when bodies floating in a background fluid are set in relativistic motion. Suppose some macroscopic body, say, a submarine designed to lie just in equilibrium when it rests (totally) immersed in a certain background fluid. The puzzle arises when different observers are asked to describe what is expected to happen when the submarine is given some high velocity parallel to the direction of the fluid surface. On the one hand, according to observers at rest with the fluid, the submarine would contract and, thus, sink as a consequence of the density increase. On the other hand, mariners at rest with the submarine using an analogous reasoning for the fluid elements would reach the opposite conclusion. The general relativistic extension of the Archimedes law for moving bodies shows that the submarine sinks. As an extra bonus, this problem suggests a new gedankenexperiment for the generalized second law of thermodynamics. ©2003 The American Physical Society.en
dc.description.affiliationInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900, São Paulo, SP
dc.description.affiliationUnespInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900, São Paulo, SP
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.68.027701
dc.identifier.citationPhysical Review D, v. 68, n. 2, 2003.
dc.identifier.doi10.1103/PhysRevD.68.027701
dc.identifier.issn0556-2821
dc.identifier.scopus2-s2.0-0042838324
dc.identifier.urihttp://hdl.handle.net/11449/224353
dc.language.isoeng
dc.relation.ispartofPhysical Review D
dc.sourceScopus
dc.titleRelativistic Archimedes law for fast moving bodies and the general-relativistic resolution of the submarine paradoxen
dc.typeArtigo

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