228 reputation
111
bio website facebook.com/ivan.lerner.1
location Sao Paulo, Brazil
age 22
visits member for 2 years, 8 months
seen Mar 19 at 16:14

Physics student at the University of Sao Paulo


Mar
15
awarded  Yearling
Mar
14
answered If an object rests on a table, not accelerating, how much work do both the object and the table do?
Mar
14
revised Is the Lorentz force expression valid for magnetic field created by a magnetic monopole?
added 200 characters in body
Mar
14
comment Is the Lorentz force expression valid for magnetic field created by a magnetic monopole?
It actually depends, if you are talking about the force felt by an electric charge, then it would remain the same, but not for a magnetic charge, which is given by the formula above.
Mar
14
answered Is the Lorentz force expression valid for magnetic field created by a magnetic monopole?
Mar
13
comment Why is the change in entropy for a given energy input dependent on the temperature?
@XerenNarcy this isn't necessarily the case. What I learned is that for a infinitesimal increase in energy, the temperature remains constant, but not for a finite one.
Mar
13
answered What happens to the photon if the frequency is lower than the threshold frequency?
Mar
13
answered Why does a ring falling through a magnetic field experience an upward force?
Mar
13
comment Motion of a charged particle in a “solid” charged sphere (accounting for radiation)
Just a minor note, I think you missed the vacuum permittivity in the electric field.
Mar
13
comment Why is the change in entropy for a given energy input dependent on the temperature?
That is basically what the formula is saying, what I wanted was a physical explanation. Saying that entropy is a measure of disorder says nothing of its physical nature, and is a poor base for logical understanding. Thanks for the answer though, if you can explain your point with physical arguments, it'd be great!
Mar
13
comment Why is the change in entropy for a given energy input dependent on the temperature?
@XerenNarcy I thought it might be something like that, but couldn't figure it out.
Mar
13
comment How is Angular Momentum Conserved when Mass is Released?
No, my bad, it should be the same.
Mar
13
comment How is Angular Momentum Conserved when Mass is Released?
I don't think you've showed that the angular momentum of the thrower will be the same, and in fact it might not be, it is only the same if the hammers is also the same.
Mar
12
comment How is Angular Momentum Conserved when Mass is Released?
The momentum is conserved on the system, not its parts. The momentum of the hammer might not be the same, but the total will.
Mar
12
comment Why is the change in entropy for a given energy input dependent on the temperature?
I guess you are right, but that doesn't explain much, why would disorder increase less?
Mar
12
awarded  Critic
Mar
12
awarded  Informed
Mar
11
awarded  Commentator
Mar
11
comment Why is the change in entropy for a given energy input dependent on the temperature?
I mean I don't get the physics of it, you are giving the same energy, why would the change in entropy be different according to temperature. It is not just a formula that was named entropy and that's it, it's a physical quantity with physical meaning.
Mar
11
asked Why is the change in entropy for a given energy input dependent on the temperature?