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Amazon com: Walthers, Inc. City Water Tower Kit, 3 8 X 7 6 X 17.7cm : Arts, Crafts & Sewing | #taça caixa d água

Amazon com: Walthers, Inc. City Water Tower Kit, 3 8 X 7 6 X 17.7cm : Arts, Crafts & Sewing

Amazon com: Walthers, Inc. City Water Tower Kit, 3 8 X 7 6 X 17.7cm : Arts, Crafts & Sewing

Where $\sigma$ is surface pressure of liquid (N/m) and g is gravitational constant (m/s2).