A Closer Look
The paper towel industry owes its existence to capillary action, both for the way paper towels soak up liquids and for the trees out of which the towels are made. Molecules of water are naturally attracted to each other and form temporary hydrogen bonds with each other; their attraction for each other on the surface of a liquid, for example, gives rise to surface tension. But they are also attracted in a similar way to other molecules, called hydrophilic molecules, such as those in the sides of a narrow glass tube inserted into a cup of water, in the fibers of a towel, or in the cells of tree tissue known as xylem. These attractive forces can draw water upward against the force of gravity to a certain degree. However, they are not strong enough to draw water from the roots of a tree to its highest leaves. An additional, related force, referred to as transpiration pull, is required to do that. As water evaporates from the tiny pores, or stomata, of leaves, water from adjacent cells is drawn in to replace it by osmosis. Again, intermolecular attractive forces cause other water molecules to follow along, ultimately drawing water up from the roots of the tree.
How to use capillary action in a sentence
While this deferred action is controversial in the United States, in Mexico, what Obama did is universally popular.Why Mexicans Are Enraged by Obama’s Big Tuesday Meeting|Ruben Navarrette Jr.|January 6, 2015|DAILY BEAST
This is where much of the action will be for anti-LGBT groups.
In 2008, Huckabee raised a little over $16 million, with less than $55,000 coming from political action committees.
The possibility that the same outcome could happen another way -- namely a guy asks me out -- keeps me from taking action.Random Hook-Ups or Dry Spells: Why Millennials Flunk College Dating|Ellie Schaack|January 1, 2015|DAILY BEAST
But taking such action puts them at odds with the most powerful and best-organized segment of their coalition.
Let the thought of self pass in, and the beauty of great action is gone, like the bloom from a soiled flower.
He saw Gen. Braddock as he passed on to his defeat, and could give a succinct account of that sanguinary action.The Every Day Book of History and Chronology|Joel Munsell
The wisdom of a scribe cometh by his time of leisure: and he that is less in action, shall receive wisdom.The Bible, Douay-Rheims Version|Various
Words are often everywhere as the minute-hands of the soul, more important than even the hour-hands of action.
The action was at first a little confusing to Edna, but she soon lent herself readily to the Creole's gentle caress.The Awakening and Selected Short Stories|Kate Chopin