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Jun
24
comment When a moving body collides with a stationary body, far from its centre, how do you calculate the resulting spin
@StevenNoble The angular momentum prior to the collision is nonzero.
Jun
23
comment When a moving body collides with a stationary body, far from its centre, how do you calculate the resulting spin
Consider the conservation of angular momentum.
Jun
23
comment What happens if torque = 0?
The torque is zero only when $\theta=0$.
Jun
23
comment What sort of thermodynamic process is this?
Suitable constants can probably be introduced to the equation to make it dimensionally self-consistent.
Jun
19
comment What happens with the force of gravity when the distance between two objects is 0?
possible duplicate: physics.stackexchange.com/q/2481
Jun
19
comment What happens with the force of gravity when the distance between two objects is 0?
$GmM$ is not constant along the path to the center of the Earth. $M$ starts to decrease once you are underground, and becomes zero right at the center of the Earth.
Jun
16
revised Toward the establishment of non-equilibrium (quasi-equilibrium) magnon BEC theory
tex, removed greeting
Jun
16
suggested suggested edit on Toward the establishment of non-equilibrium (quasi-equilibrium) magnon BEC theory
Jun
14
reviewed Reviewed Neutral pions and chromodynamics
Jun
12
comment How can Magnets be used to pick up pieces of metal when the force from a magnetic field does no work?
related: physics.stackexchange.com/q/10565
Jun
12
accepted Differences between spin waves and spin density waves
Jun
12
revised How does phonon cause two electrons to attract each other?
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Jun
12
asked Differences between spin waves and spin density waves
Jun
12
revised Energy Change in a Capacitor by Inserting Dielectric
tex
Jun
12
suggested suggested edit on How does phonon cause two electrons to attract each other?
Jun
12
suggested suggested edit on Energy Change in a Capacitor by Inserting Dielectric
Jun
9
revised Bose gas with $T = 0$ and $\mu < 0$
tex
Jun
9
comment Bose gas with $T = 0$ and $\mu < 0$
You might interested in this: tex.stackexchange.com/q/47078
Jun
9
suggested suggested edit on Bose gas with $T = 0$ and $\mu < 0$
Jun
9
comment Friction acting on a particle on a rough place
There is static friction even when the particle is not moving. Friction always acts in the direction to oppose motion.