Question

what type of tube will generate water moving higher in the tube due to capillary action (cohesion & adhesion)?
1 mm in diameter
microscopic
1 cm in diameter

Explanation:

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity. The narrower the tube (smaller diameter), the greater the capillary action. A microscopic - sized tube has a very small diameter. In a 1 - mm - diameter tube, the capillary rise is less compared to a microscopic tube. A 1 - cm - diameter tube is relatively wide, and the capillary action will be much less effective in causing the water to rise high.

Answer:

microscopic