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Jul
25
comment Solving for the resonant frequencies of a mass-spring system
It doesn't make sense to have a frequency in units of acceleration. What is going on?
Jul
10
comment Is there a simple equivalent to Ohm's law for gas (pressure=R*throughput)?
In your venturi equation and mass convervation you are assuming constant density. Is that actually the case for what you are studying?
Jul
10
comment With a machete, why is a diagonal cut more effective than a right angle one?
Maybe the internal structure of what you are cutting plays a role as well?
Jul
10
comment Is there a simple equivalent to Ohm's law for gas (pressure=R*throughput)?
In my opinion this question is much better when leaving out your specific situation.
Jul
8
comment Is the vortex in a kitchen sink an example of a singularity?
My point is that in the vortex in the sink, there typically is a vertical velocity component.
Jul
8
comment Is the vortex in a kitchen sink an example of a singularity?
What about the third dimension?
Jul
1
comment How to emulate 40ft (12 m) of water?
@JohnRennie You put water in your bicycle tyres?
Jun
30
comment Sedimentation at the bottom of a vessel
Did you look into the field of fluidized beds? I can imagine there are relevant similarities.
Jun
29
comment Is it possible to hear trains when you live nothing near them?
Thought about this: youtube.com/watch?v=2kDORB3vR8s
Jun
28
comment Can gravity in principle be made to flow through a “wire”?
What about a waterfall?
Jun
28
comment Acceleration derivative
Your last equation is dimensionally incorrect.
Jun
28
comment Estimate the amount of atoms in the smallest speck of matter you can see with the naked eye
1) How did you transform volume to amount of atoms? 2) Why did you pick a sphere, and not just a disk-like volume?
Jun
28
comment Numerically summing a divergent series
Also, I think this question would be much more appropriate on Computational Sciense SE.
Jun
28
comment Numerically summing a divergent series
@grdgfgr The point is that you get an "arbitrary" result based on the amount of terms and resolution. Analytically you might be able to say something useful when taking limit to 0 or $\infty$, but numerically you can only take limits to very small or very large (system precision). This is just not the same thing.
Jun
24
comment Moment of Inertia of Water.
Do you know how to calculate the center of mass of two point masses? And three point masses? See where this is going?
Jun
7
comment Why doesn't this magnetic perpetual motion machine work?
I like the sketch before your edit a bit better actually.
May
25
comment Programming in physics
Interesting question, but I am afraid it will be closed as primarily opinion based. If not, I can write a long story on my opinion on this issue. Basically do as many physicists do: learn as you need. Most physicists are very lousy programmers, so don't worry to much about it.
May
24
comment Can I do something for being heavier to be lifted?
@GlenTheUdderboat And, standing on one side, it would be easier to lift a 2m stick, than a 4m stick of the same mass.
May
24
comment Soliton solution for a diffusive system
Also, this may be more appropriate on the math stackexchange.
May
24
comment Soliton solution for a diffusive system
@sailx Ok, I understand your question better now. You may want to look into the error function, as it might help you. I am however a bit afraid for the quadratic term in the equation.