Question

Pipa kapiler berdiameter 2 mm dicelupkan zat cair setinggi 20 cm.jika sudut kontak zat cair sebesar 30°, tegangan permukaan zat cair sebesar....

Answer 1

Verified answer

FLUIDA STATIS
▶Kapilaritas

ρ = 1000 kg/m³ = 10³ kg/m³
d = 2 mm ↔ R = 10⁻³ m
θ = 30° ↔ cos θ = ½ √3
y = 20 cm = 2 × 10⁻¹ m
g = 10 m/s² ... anggap

γ = ???

y = 2 γ cos θ / (ρ g R)
2 × 10⁻¹ = 2 γ × ½√3 / (10³×10×10⁻³)
γ = ⅔√3 N/m.

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