alleryWater (γ = 0.072 N/m, ρ = 1000 kg/m³) rises in capillary 1 mm diameter (assume θ = 0):
A2.94 cm (h = 2γ/(ρgr) = 2×0.072/(1000 × 9.8 × 5×10⁻⁴))
B5 cm
C3 mm
D1.5 cm
Answer & Solution
Correct answer: A. 2.94 cm (h = 2γ/(ρgr) = 2×0.072/(1000 × 9.8 × 5×10⁻⁴))
We have r = 0.5.
So mm = 5 × 10⁻⁴ m.
We have h = 2γ/(ρ g.
Then r) = 2(0.072)/(1000 × 9.8 × 5e-4).
So r) = 0.0294 m ≈ 2.94 cm.
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