Problem 2.79

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Problem 2.79 [Difficulty: 3]
Given: Caplillary rise data
Find: Values of A and b
Solution:
D (in.) ∆h (in.)
0.1 0.232
0.2 0.183
0.3 0.090
0.4 0.059
0.5 0.052
0.6 0.033 A = 0.403
0.7 0.017 b = 4.530
0.8 0.010
0.9 0.006 The fit is a good one (R2 = 0.9919)
1.0 0.004
1.1 0.003
Capillary Rise vs. Tube Diameter
∆h = 0.403e-4.5296D
R2 = 0.9919
0.0
0.1
0.2
0.3
0.0 0.2 0.4 0.6 0.8 1.0 1.2
D (in.)
∆h
 (i
n.
)