Resolução Hallyday vol 2 c...ulo 14, 15, 16, 18, 19 e20 - exercicio (75), Manuais, Projetos, Pesquisas de Engenharia Física

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75. If we examine both sides of the U-tube at the level where the low-density liquid (with p = 0.800 g/em = 800 kg'n” ) meets the water (with pw= 0.998 g/em” = 998 kgm)). then the pressures there on either side of the tube must agree: pgh = puglw where h = 8.00 cm = 0.0800 m, and Eq. 14-9 has been used. Thus. the height of the water column (as measured from that level) is ly = (800/998)(8.00 cm) = 6.41 cm. The volume of water in that column is therefore V= Tr ho = (1.50 em) (6.41 cm) = 45.3 en”.