2.4 Particle interactions

• What are the four fundamental forces in nature?

  Strong, weak, electromagnetic, gravitational
• The weak interaction is responsible for certain types of radioactive decay
• Gravitational interactions are the weakest of the fundamental forces
• Particle interactions are mediated by exchange particles.


  True
• The weak interaction is mediated by W and Z bosons
• What is the range of the gravitational interaction?

  Infinite
• Match the force with its properties:

  Strong ↔️ Short range, strongest

  Weak ↔️ Short range, weaker than strong

  Electromagnetic ↔️ Infinite range, medium strength

  Gravitational ↔️ Infinite range, weakest
• The electromagnetic force is stronger than the gravitational force but weaker than the strong
• What is the role of gluons in the strong interaction?

  Transfer force between quarks
• Which fundamental force is responsible for electrical and magnetic phenomena?

  Electromagnetic force
• What is the name of the particles that mediate the weak interaction?

  W and Z bosons
• Which interaction is responsible for beta decay?

  Weak interaction
• The strong interaction has a short range, effective only within the nuclear
• What is the importance of the strong interaction for atomic nuclei?

  Stability
• What particles mediate the weak interaction?

  W and Z bosons
• The weak interaction is weaker than the strong interaction


  True
• What particle mediates the electromagnetic interaction?

  Photon
• What phenomena are governed by the electromagnetic interaction?

  Light and electricity
• The gravitational interaction has an infinite range.
• What celestial motions are governed by gravity?

  Planetary orbits
• Order the fundamental forces from strongest to weakest:

  1️⃣ Strong

  2️⃣ Weak

  3️⃣ Electromagnetic

  4️⃣ Gravitational
• The strong interaction is responsible for binding quarks together to form protons and neutrons
• The range of the strong interaction is infinite

  False
• Why is the strong interaction important for atomic nuclei?

  Ensures their stability
• The weak interaction is responsible for certain types of radioactive decay
• The weak interaction has a short range but is stronger than the strong interaction.

  False
• The weak interaction governs radioactive decay processes.
• The electromagnetic interaction has an infinite range but is weaker than the strong interaction.

  True
• What is the range of the gravitational interaction?

  Infinite
• The gravitational interaction is the weakest of the fundamental forces.
• The weak interaction is responsible for certain types of radioactive decay.
• Which interaction attracts objects with mass and governs the motion of celestial bodies?

  Gravitational
• Particle interactions refer to the fundamental forces that govern how particles interact with each other
• The strong interaction is the weakest of the fundamental forces.

  False
• Electromagnetic interactions have infinite range.

  True
• What are the particles involved in the strong interaction?

  Quarks and gluons
• Which interaction is the strongest of the four fundamental forces?

  Strong interaction
• Electromagnetic interactions are weaker than gravitational interactions.

  False
• Order the fundamental forces from strongest to weakest:

  1️⃣ Strong

  2️⃣ Weak

  3️⃣ Electromagnetic

  4️⃣ Gravitational
• Which force holds the nucleus of an atom together?

  Strong force