Title: Theory / Unimportant / Experimental / Physics / Feynman / electromagnetism and matter

Question: The force that holds the atoms together, and the chemical forces that hold molecules together, are
Answer: electrical forces acting in regions where the balance of charge is not perfect, or where the distances are very small.
Chapter: 1

Question: Proton's charge is
Answer: positive
Chapter: 1

Question: Electron's charge is
Answer: negative
Chapter: 1

Question: Nuclear force
Answer: A force acting mostly between a proton and its closest neighbors
Chapter: 1

Question: Nuclear energy is, in fact
Answer: Electrical energy released when electrical forces have overcome the attractive nuclear force
Chapter: 1

Question: What holds an electron together/why doesn't it repulse itself
Answer: Not known, it should just be considered as a point
Chapter: 1

Question: The force that acts on a particular charge depend on
Answer: only the position of that particular charge, on the velocity of the charge, and on the amount of charge.
Chapter: 1

Name: The force on \(q\)
Definition: q(E+vB)
Chapter: 1
Variables: q a charge
v its velocity
E the electric field
B the magnetic field

Name: The field produced by both charges
Definition: E1+E2
Chapter: 1
Variables: q1,q2 charges
E1, E2 the fields they product

Name: The principle of superposition of fields
Definition: The fact that a fields is the sum of the fields generated by every charges
Chapter: 1

Name: A field
Definition: Any physical quantity which takes on different values at different points in space.
Chapter: 1
Section: 2
Denoted by: A graph, with arrows at some points representing the vector at this point

Name: A field line of \(E\)
Definition: A line, asymptotic in each point \(p\) to the vector \(E(p)\).
Chapter: 1
Section: 2
Variables: \(E\) a field of vectors

Question: The density of field lines is
Answer: proportional to the magnitude of the field, when the density is considered perpendicularly to the field
Chapter: 1
Section: 2
Variables: \(E\) a field of vectors

Name: The flux of the field through \(S\)
Definition: Average normal component multiplied by surface area.
Chapter: 1
Section: 3
Variables: \(E\) a field of vectors,
\(S\) an oriented closed surface
Name2: The outward flux of the field through \(S\)

Name: An electric flux
Definition: The flux of an electric field
Chapter: 1
Section: 3

Name: The circulation of \(E\) in \(L\)
Definition: Average tangential component multiplied by distance around.
Chapter: 1
Section: 3
Variables: \(E\) a vector flux,
\(L\) a closed line

Name: Nuclear force
Definition: A force acting mostly between a proton and its closest neighbors
Chapter: 1