Intermolecular forces are an important factor in determining the properties of a substance.

The van der Waals force is an important concept in explaining intermolecular interactions.

Please research the interaction between these two drugs.

Strong interaction is one of the four fundamental forces in particle physics.

Weak interaction is one of the four fundamental forces between elementary particles.

Fundamental interaction is one of the most important forces in physics.

Gravitational interaction creates attraction between objects.

Electromagnetic interaction is one of the fundamental forces used to explain the force between substances.

This concept is difficult.

Health is very important.