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I'm a physics graduate student.


May
18
comment How does the kinetic energy of a ballerina increase?
physics.stackexchange.com/q/3611
May
18
comment How does the kinetic energy of a ballerina increase?
possible duplicate of Ice skater increase of energy
May
13
awarded  quantum-mechanics
May
12
awarded  Nice Answer
May
12
comment Potential of an infinitely long cylinder
In reply to "work done by the electric field", you are not reading the entire sentence. It is the work done in taking the charge out to infinity. The further out you are from your cylinder, the less work done in taking the charge to infinity, so the potential goes down.
May
12
comment Potential of an infinitely long cylinder
The point is that energy is conserved. When the E-field does work on a particle, the particle's kinetic energy goes up and its potential energy goes down by the same amount so that the total energy stays the same.
May
12
answered Potential of an infinitely long cylinder
May
12
answered If two kets are each orthogonal to a third ket, are they also orthogonal to each other?
May
10
revised Is there any upper limit on a particles kinetic energy?
deleted 1 character in body; edited tags
May
3
revised How does a hovercraft hover, if it has low pressure underneath it?
rolled back to a previous revision
May
3
comment How does a hovercraft hover, if it has low pressure underneath it?
I don't know, sorry. Wikipedia is usually a good first place to look.
May
3
answered How does a hovercraft hover, if it has low pressure underneath it?
May
3
revised Why does Bernoulli's principle work?
added 98 characters in body
May
3
answered Why does Bernoulli's principle work?
Apr
30
awarded  Good Answer
Apr
28
comment Is there any disadvantage to sending rockets straight up?
Yakk, yes, good point.
Apr
28
revised Is there any disadvantage to sending rockets straight up?
added 75 characters in body
Apr
28
awarded  Guru
Apr
27
revised Is there any disadvantage to sending rockets straight up?
edited title
Apr
27
awarded  Good Answer