Now you can run naked and shout Eureka!

Author： Monteiro F F   Lima F M S  

Publisher： IOP Publishing

E-ISSN： 1361-6404|36|6|68002-68004

ISSN： 0143-0807

Source： European Journal of Physics, Vol.36, Iss.6, 2015-11, pp. : 68002-68004

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

A common mistake in introductory physics textbooks is the omission of the buoyant force exerted by the air on an object floating in a liquid. One previous work (Lan 2000 Phys. Teach. 38 125) includes that missing term but assumes that the air, like the liquid, is incompressible. Here we account for the barometric variation in the density of air with altitude. Although the numerical size of that correction is small, it is conceptually important because it helps students better appreciate that buoyancy results from the variation in fluid pressure across the surface of an object.

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