Particle Physics

What is a *neutrino*?

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What are the *fundamental forces* (fundamental interactions) in nature?

1. gravitational force 2. strong nuclear force 3. weak nuclear force 4. electromagnetism OR 1. gravitational force 2. strong nuclear force 3. electroweak force

What is the *electroweak force*?

A unification of electromagnetism and the weak nuclear force. These 2 are actually different versions of the same force.

Which fundamental force is the *weakest*?

Gravity (gravitational force).

Which fundamental force is the *strongest*?

Strong nuclear force.

What is the *weak nuclear force*?

The force responsible for radioactive decay and nuclear fusion.

What is the *strong nuclear force*?

The force that holds the nucleus together and is responsible for making protons and neutrons.