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Surface Tension and Capillary Tubes Worksheet Answer Key. The process through which water is pulled up a thin, glass tube against gravity is called capillary action. Water rises in the tube due to the attractive forces between the liquid and container’s solid walls.
Cohesive forces between molecules cause the surface of a liquid to contract to the smallest possible surface area. This general effect is called surface tension. Molecules on the surface are pulled inward by cohesive forces, reducing the surface area.
Surface Tension Worksheet. Derivations and definition based problems. Question 1 Define Surface tension and explain surface tension on the basis of molecular theory. Question 2 Define Surface energy. Prove it is numerically equal to surface tension.
Surface tension creates a finite jump in pressure across the interface, but the typical magnitude of surface tension limits its influence to fluid bodies much smaller than the huge planets and stars discussed in the preceding chap-ters.
Surface tension is a direct measure of this energy loss per unit area of surface. If the characteristic molecular dimension is R and its area thus R 2 , then the surface tension is σ ∼ U/(2R 2 ).
What is the impact of surface tension phenomena on engineering problems? This is a matter of scales. In many applications, the effects are very small, in others is crucial. Consider once more a droplet of radius r. Under a gravitational field, the force acting on the droplet will be of the order of its weight ! F g "mg=#4 3 $r3g, whereas the
Surface Tension Questions and Answers - Practice questions, MCQs, PYQs, NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions, and PDF Questions with answers, solutions, explanations, NCERT reference, and difficulty level in Surface Tension chemistry.
