Question: Determination of capillary radius by flow measurement, one method for determining the radius of a capillary tube is by measuring the rate of flow of

Determination of capillary radius by flow measurement, one method for determining the radius of a capillary tube is by measuring the rate of flow of a Newtonian liquid through the tube. Find the radius of a capillary from the following flow data:

Length of capillary tube 50.02 cm

Kinematic viscosity of liquid 4.03 x 10^–5 m²/s

Density of liquid 0.9552 x 10³ kg/m³

Pressure drop in the horizontal tube 4.829 x l0⁵ Pa

Mass rate of flow through tube 2.997 x 10^–3 kg/s

What difficulties may be encountered in this method? Suggest some other methods for determining the radii of capillary tubes.

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