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visits member for 2 years, 7 months
seen Jul 15 at 4:56

Dec
20
awarded  Popular Question
Aug
27
comment Are orbiting planets an example of perpetual motion?
@LuboŇ°Motl, but the planets are accelerated all the time, aren't they?
Jun
28
awarded  Popular Question
Jun
13
awarded  Notable Question
Jun
4
comment Total current of two sources in series?
@dmckee, as far as Kirchhoff's theory goes, I agree to Will's answer. But maybe you can demonstrate application you had in mind?
Jun
4
comment Total current of two sources in series?
Yes, that's about as much as I can get out from those equations myself.
Jun
4
comment Total current of two sources in series?
@Will that is all the information he supplied.
Jun
4
asked Total current of two sources in series?
May
22
comment What is the effect of humidity in temperature?
@user61001, yes, apparent one. If humidity is higher, it seems hotter to people compared to medium or low humidity.
May
19
comment What is the effect of humidity in temperature?
"Tashkent" is synonymous for "very hot". What's with the outside? I don't really understand the new question.
May
19
comment can be exist the negative mass?
Physics become interesting when you consider exotic and scifi-like things. Even Newton's second law becomes funny if you consider negative masses :)
May
19
answered What is the effect of humidity in temperature?
May
19
comment can be exist the negative mass?
And negative masses would attract each other, but repel positive masses, right? That's why they are somewhere far :)
May
19
comment Problem with a rotating frame of reference on the South pole
@Althalos, there is no centrifugal acceleration on the axis. In which direction could it be there? Your formula is correct, but the $R$ is distance from axis of rotation which is $0$ in your case.
May
18
awarded  Custodian
May
18
reviewed Approve suggested edit on Problem with a rotating frame of reference on the South pole
May
18
comment Physics of every-day life: rotating bag of tea
I think it's just the torque that's stored in the thread...
May
18
comment Problem with a rotating frame of reference on the South pole
Rotating frame in which train is going straight (as says in the exercise). Yes, $\Omega$ is. Try $\tan(\theta)=F_c/F_a = a/g$. Also $\tan(\theta) = \sin(\theta) = \theta$ (in radians) should for work such a small angle.
May
18
answered Problem with a rotating frame of reference on the South pole
Apr
28
comment Why does the fundamental mode of a recorder disappear when you blow harder?
@Georg, a few years late answer, bet I wanted to add that the higher mode does not slowly overtake. It's a sudden shift of pitch.