rest energy

Thân thiện

A scientist writes the equation for rest energy on a classroom whiteboard.

Definition

1. Noun:
   • The energy equivalent to the mass of a particle at rest in an inertial frame of reference: This is the intrinsic energy an object possesses due to its mass when it is not moving. It is a fundamental concept in Einstein's theory of special relativity, representing the energy content of an object's mass itself.

Usage

• Noun:
  • Rest energy is a property of all matter, even when stationary.
  • The concept of rest energy demonstrates that mass and energy are equivalent.
  • In nuclear reactions, a small fraction of the rest energy of particles is converted into other forms, releasing tremendous power.

Examples

• Noun:
  • According to Einstein's famous equation, the rest energy (E₀) of an object is equal to its rest mass (m₀) multiplied by the speed of light (c) squared: E₀ = m₀c².
  • The rest energy of an electron is approximately 511 kiloelectronvolts.
  • In particle physics, the total energy of a moving particle is the sum of its rest energy and its kinetic energy.

Advanced Usage

• "To calculate the rest energy": to determine the intrinsic energy from a known mass.
  • Scientists can calculate the rest energy of a proton with great precision.

Variants and Related Words

• Rest mass (n): The mass of an object as measured in a frame of reference where it is at rest. This is the mass (m₀) used in the rest energy equation.
  • The rest mass of a particle is an invariant quantity in special relativity.

Synonyms

• Mass-energy equivalence: The principle, encapsulated by E=mc², that mass and energy are different forms of the same thing. is a specific manifestation of this principle.
• Invariant mass energy: Another term emphasizing that this energy value is independent of the object's motion.

Related Concepts (Not Phrasal Verbs or Idioms)

• Total energy: The sum of an object's rest energy and its kinetic energy.
• Kinetic energy: The energy an object possesses due to its motion.
• Binding energy: The energy that holds a nucleus together, which is related to a difference in rest energies between the nucleus and its constituent protons and neutrons.

Học thuật

Noun

1. the energy equivalent to the mass of a particle at rest in an inertial frame of reference; equal to the rest mass times the square of the speed of light