Glossary - Zena and Lynda's Physics Project
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Forces
- There are 4 known forces: gravitational force, electromagnetic force, strong nuclear force, and weak nuclear force

 Gluons
- Hypothetical subatomic particle that mediates the strong force between quarks

 Hadrons
- Component of nuclear matter (e.g. protons, neutrons, pion)
- Is an elementary particle

 Mass Gap
- Property that describe when traveling at the speed of light, quantum particles still have mass

 Nucleus
- The central part of the atom
- Hadrons are located here

 Particle
- A very small portion of matter

 Quantum Chromodynamics (QCD)
- Theory that explains the behaviour of quarks and gluons

 Quantum Particles
- Particles that have a minimum amount of physical quantity that can exist in an atom

 Quarks
- Quarks are combined to form hadrons
- Six types of quarks: up, down, charm, strange, top and bottom

 Strong Nuclear Force
- The strong force that binds quarks and hadrons together in the nucleus of an atom
- Also known as the strong force

 Theory of Relativity
- Anything that has mass, will have a mass equal to zero when it travels at the speed of light





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