Glycerine flows steadily through a horizontal tube of a length of 1.5 m and a radius of 1.0 cm. If the amount of glycerine collected per second at one end is 4.0 × 10–3 kg s–1, what is the pressure difference between the two ends of the tube?
(Density of glycerine = $1.3×{10}^{3}$
kg m–3 and viscosity of glycerine = 0.83 Pa-sec).
1. 7.9 × 10−2 Pa
2. 8.9 × 10−3 Pa
3. 9.8 × 10−2 Pa
4. 6.7 × 10−3 Pa

Subtopic:  Viscosity |
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What is the largest average velocity of blood flowing in an artery of radius $$2\times 10^{-3}$$ m if the flow must remain laminar?
(Take the viscosity of blood to be $$2.084\times 10^{-3}$$ Pa-s and density of blood to be $$1.06\times 10^3$$ kg/m3).
1. $$0.459$$ m/s
2. $$0.0987$$ m/s
3. $$0.983$$ m/s
4. $$0.0897$$ m/s

Subtopic:  Types of Flows | Viscosity |
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To view explanation, please take trial in the course.
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