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14h
revised finding equation of a water droplet
added 148 characters in body
1d
answered finding equation of a water droplet
1d
comment finding equation of a water droplet
@Hossein ok, so you are basically looking at droplets that are still wobbling due to their release then?! In that case my suggestion doesn't work indeed.
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comment finding equation of a water droplet
@Hossein As I mentioned: droplets tend to flatten at the bottom so you expect $H/W<1$ where $H$ is the height of the droplet in the direction of gravity and $W$ the width perpendicular to that direction.
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comment finding equation of a water droplet
@MikeDunlavey if they are sufficiently small they are, but if they have a typical size around the capillary length they tend to become somewhat flattened at the bottom. That said, the ellipsoid in the image looks way too non-spherical (but it might be the particular view).
Oct
20
comment Underdetermined forces in a statics problem
BenCrowell, Isn't the answer just the same as in the example of @BMS ? Even without friction the cylinder will remain static, like the block on a string. Friction is a `response force' i.e. its magnitude is equal to the force applied to it (up to some maximum), so in your case giving the surface a friction coefficient doesn't result in a friction force, because the system was already balanced
Oct
11
comment Would you die before reaching the ground?
@Floris - I guess you have this in mind ;) hugelolcdn.com/i700/188681.jpg
Oct
10
revised Why do Oreo crumbs float to a single glob at the very center in a glass of milk?
added ST tag
Oct
10
suggested suggested edit on Why do Oreo crumbs float to a single glob at the very center in a glass of milk?
Oct
10
comment Why do Oreo crumbs float to a single glob at the very center in a glass of milk?
Related: physics.stackexchange.com/q/71292 (possible duplicate from an underlying physics perspective)
Sep
30
awarded  Explainer
Sep
30
answered Why does a bubble take a spherical shape?
Sep
30
comment Why does a bubble take a spherical shape?
I think you are confusing the terms surface tension and curvature. Surface tension, $\gamma$, is a physical property of the fluids at the interface and is not dependent on shape. Curvature, $\kappa$, is the term that multiplies with the surface tension to give the laplace pressure ($P=\gamma \kappa$). It is this curvature (crudely put the second derivative of the function describing the shape) that is shape dependent.
Sep
24
awarded  Popular Question
Sep
20
answered On boiling, does 1 kg of water give rise to 1 kg of steam?
Aug
26
comment Why do we fall down when the bicycle slows down?
@bobie that is the same question, because if it isn't stable i.e. if there is a sustained net force, it will fall. - It's that same as answering the question "do you like purple?" with "I hate purple". It answers the question even though you don't directly say that you don't like purple.
Aug
26
comment Why do we fall down when the bicycle slows down?
To add to the 'gyroscopic effect doesn't do it' discussion: this was the nail in the coffin: sciencemag.org/content/332/6027/339 - the paper mentioned by Bernhard is earlier work from the same group
Aug
2
comment Why is Avogadro's law always true?
Nice answer! Maybe a small addition that is useful for the OP. A noninteracting gas is called an ideal gas. That is also where the ideal gas law gets its name
Jul
16
revised Determine the number of days with North-East wind direction from the number of days with North and East wind direction?
updated title
Jul
16
suggested suggested edit on Determine the number of days with North-East wind direction from the number of days with North and East wind direction?