Definition

1. Noun:
   • A scientific instrument for measuring minute forces: A torsion balance is a precision measuring instrument designed to measure extremely small forces by detecting the amount of twist (torsion) they produce in a thin, suspended wire or fiber.

Usage

• The torsion balance is a key instrument in physics experiments requiring high sensitivity.
• Scientists use a torsion balance to measure gravitational constants or electrostatic forces.

Examples

Advanced Usage

• "to be measured with a torsion balance": Describes a force so small it requires this specific, sensitive instrument.
  • The Casimir effect, a tiny quantum force, was confirmed using a torsion balance.

Variants and Related Words

• Torsion (n): The action of twisting or the state of being twisted, especially of one end of an object relative to the other.
  • The torsion in the wire was proportional to the applied force.
• Balance (n): An instrument for weighing, typically involving a pivoted horizontal beam.
  • A laboratory balance provides precise mass measurements.

Synonyms

• Torsion pendulum: While often similar in principle, a torsion pendulum typically measures torque or moment of inertia through oscillatory motion, whereas a torsion balance measures a static force.
• Sensitive balance: A general term for any balance capable of detecting very small forces or masses.

Related Phrases

• Torsion wire/fiber: The thin, twisted element at the heart of the instrument.
  • The sensitivity of the torsion balance depends on the thickness and material of its torsion wire.

Noun

1. measuring instrument designed to measure small forces by the torsion they exert on a thin wire