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  • 13 votes cast
Mar
17
awarded  Critic
Mar
17
comment Force on a point charge q inside a cavity in an uncharged conductor
How about the induced charges on the inner surface of the conductor (around the cavity)? This may exert a force on the charge. See the other answers.
Jul
13
awarded  Notable Question
Mar
30
awarded  Notable Question
Mar
4
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Sep
24
awarded  Autobiographer
Jan
29
awarded  Popular Question
Jan
2
asked Is the assumption that the two reference frames be inertial required in the derivation of transformation equations?
Sep
2
awarded  Popular Question
May
26
awarded  Popular Question
Sep
21
awarded  Custodian
Jun
14
revised How is external pressure transmitted when a fluid is not enclosed?
added 65 characters in body
Jun
14
asked How is external pressure transmitted when a fluid is not enclosed?
May
24
comment Coulomb's Law: why is $k = \dfrac{1}{4\pi\epsilon_0}$
Maybe I'll get back to the questions once I've finished a few chapters on intro e&m.
May
24
comment Coulomb's Law: why is $k = \dfrac{1}{4\pi\epsilon_0}$
Thank guys. I'm just a freshman so I can't still make out all this stuff by myself.
May
21
comment Coulomb's Law: why is $k = \dfrac{1}{4\pi\epsilon_0}$
I don't think it's as simple as that. Unlike the gravitational constant G which has a numerical value and is a feature of the choice of units, k uses a constant $\epsilon_0$ which has a physical meaning.
May
20
asked Coulomb's Law: why is $k = \dfrac{1}{4\pi\epsilon_0}$
Feb
25
comment What math do I need for mathematical physics? In what manner should I learn math?
@Alexander: I want to understand as much mathematics as possible. But it would really take too much time, so I want to know which would really be useful.
Feb
22
revised What math do I need for mathematical physics? In what manner should I learn math?
added 1 characters in body
Feb
22
asked What math do I need for mathematical physics? In what manner should I learn math?