Thermonastic movements take place in relation to the plant, and is not determined by external force of a directive nature.
These means of investigation are not in principle different from those we employ in the detection of molecular distortion in inorganic matter under increasing intensities of an external force.
The quality or state of being spontaneous, or acting from native feeling, proneness, or temperament, without constraint or external force.
It is impossible in this case to account for the sense of being a free agent, by saying that this merely means that we are conscious of no external force.
Since commerce bears exactly the same relation to nations now as in times past, and since it is an agency within mankind itself, it is difficult to see how it can act as an external force, or cause an external force to be applied.
Inasmuch as civilization is merely a condition in which men live, and an expression of their history, character and aims, it is difficult to see how it could of itself act as an external force, or cause an external force to act.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "external force" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.