File:0044 Livella A Bolla D'aria.jpg

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Italiano: La livella a bolla fu inventata da M. Thèvenot nel 1666.

Il tubo di vetro che la compone è parzialmente riempito da un liquido come alcol o etere, per la loro fluidità, e la bolla è costituita da aria e vapore del liquido stesso. la bolla tende a galleggiare nella parte più alta avendo una densità minore del liquido. Il tubo di vetro è completamente ricoperto da un cilindro metallico che funge da custodia, ma la parte centrale rimane scoperta.

Quando la livella è in piano orizzontale, la bolla si trova al centro. Dunque, tale strumento viene utilizzato, per misurare l'inclinazione di un asse: posta la livella su un asse, si legge la graduazione segnata dai due estremi della bolla.
Date
Source Gabinetto Scientifico Perticari, Senigallia, (AN)
Author Liceo Classico Giulio Perticari, Senigallia, (AN)

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