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14h
reviewed Approve suggested edit on QED Vertex Factor/Rule
14h
reviewed Approve suggested edit on A force opposing Gravity
14h
reviewed Approve suggested edit on Can we harvest energy from constant gripping?
14h
reviewed Approve suggested edit on Water escaping from a pendulum bob, how is time period affected?
1d
reviewed Approve suggested edit on Calculate the flux of a point charge with Gauss's law
Oct
21
awarded  Yearling
Oct
20
reviewed Approve suggested edit on Which moves faster in a time $t$: $A$ or $B$?
Oct
19
revised Deriving the Coulomb force equation from the idea of photon exchange?
deleted 25 characters in body
Oct
19
answered Deriving the Coulomb force equation from the idea of photon exchange?
Oct
19
revised Why is an electron negatively charged, and what is the difference between negative and positive charges?
added 20 characters in body
Oct
19
revised Why is an electron negatively charged, and what is the difference between negative and positive charges?
added 20 characters in body
Oct
19
answered Why is an electron negatively charged, and what is the difference between negative and positive charges?
Oct
19
reviewed Approve suggested edit on Properties of an object whose collision with Earth would completely disintegrate Earth
Oct
17
reviewed Approve suggested edit on About the meaning of quantum numbers
Oct
17
comment Lorentz transformations an EM fields
Actually 4-potential of EM field isn't Lorentz 4-vector.
Oct
15
reviewed Approve suggested edit on Linearization of equation of oscillatory motion
Oct
14
accepted Permutations of two identical particles in two dimensions
Oct
13
comment About $U(1)_A$ symmetry,
$U(1)_{A}$ symmetry just means that you have theory of massless fermions $a_{1}, a_{2}, ...$ which is invariant under set of transformations $a_{i} \to e^{i\alpha \gamma_{5}}a_{i}$. It is an axial symmetry.
Oct
11
revised How are Feynman rules derived (in general)?
added 287 characters in body
Oct
11
revised How are Feynman rules derived (in general)?
added 30 characters in body