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Capillary Action (Grades 11-12)

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Capillary Action

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

What is true for a liquid level in a narrow tube as compared to a wider tube?
  1. The liquid level will be higher in a wider tube.
  2. The liquid level will be higher in a narrow tube.
  3. Level of liquid does not depend on thickness of tube.
The adhesive forces causing capillary action are the                                                  between the liquid and surrounding solid surfaces.
One of the causes of capillarity is the                 force of surface tension.
  1. adhesive
  2. angular
  3. repulsive
  4. cohesive
For a liquid inside a capillary, when the particles in the liquid have a stronger attraction to each other (cohesion) than to the material of the container (adhesion), the liquid forms a                 meniscus.
  1. flat
  2. serrated
  3. convex
  4. concave
What kind of meniscus is observed in a mercury-in-glass thermometer?
  1. concave
  2. convex
  3. flat
  4. serrated
The height of the liquid column that is raised in a capillary is independent of
  1. contact angle.
  2. density of liquid.
  3. acceleration due to gravity.
  4. liquid-air surface tension.
  5. depth to which the capillary is submerged.
  6. radius of the tube.
Give two examples of capillary action seen in everyday life.

Explain capillary action.

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