surface-tension

Definition

1. Noun:
   • Physical property: "surface-tension" is the elastic-like force existing at the surface of a liquid, caused by the attraction of molecules to each other, which tends to minimize the surface area. It is measured as force per unit length or energy per unit area.

Usage Examples

• Noun:
  • Water has a high surface-tension, allowing insects to walk on its surface. (The cohesive force at the water's surface supports small creatures.)
  • Adding soap reduces the surface-tension of water, making it easier to clean dishes. (The detergent breaks the molecular attraction, lowering the tension.)

Advanced Usage

• "to measure surface-tension": to quantify the force using instruments like a tensiometer.

  • Scientists measure surface-tension to study the properties of liquids. (They assess the cohesive force for research purposes.)

• "surface-tension effects": observable phenomena caused by this property, such as capillary action or droplet formation.

  • The spherical shape of raindrops is due to surface-tension effects. (The force pulls the water into a minimal-area shape.)

Variants and Related Words

• Surface tension (n, alternative spelling): the same property, often written as two words.

  • The surface tension of mercury is very high. (Mercury's cohesive force is strong.)

• Tension (n): the state of being stretched tight; in physics, a pulling force.

  • The rope was under high tension. (The rope was stretched firmly.)

Synonyms

• Cohesive force: the intermolecular attraction at a liquid's surface.
• Capillary force: a related effect of surface tension in narrow spaces.

Related Idioms

• No common idioms directly use "surface-tension," but it appears in scientific contexts:
  • The surface-tension of the situation was palpable. (Figurative use: the "tension" at the surface of a social interaction, though rare.)