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Water creates itself into a ball shape on iss?why?
The sphere has the smallest surface area of all surfaces that enclose a given volume, and it encloses the largest volume among all closed surfaces with a given surface area. The sphere therefore appears in nature: for example, bubbles and small water drops are roughly spherical because the surface tension locally minimizes surface area.
Quote from: gazza711Water creates itself into a ball shape on iss?why?It has to do with a minimization of problem, i.e. see: https://en.wikipedia.org/wiki/SphereQuoteThe sphere has the smallest surface area of all surfaces that enclose a given volume, and it encloses the largest volume among all closed surfaces with a given surface area. The sphere therefore appears in nature: for example, bubbles and small water drops are roughly spherical because the surface tension locally minimizes surface area.So a blob of water with a given volume will naturally form a sphere in zero gravity. If gravity was there it wouldn't be able to form a sphere because other forces, such as gravity, would be acting on it.
i thought surface tension was a pond skater on water or spiders
could the water is forced into a blob on iss from the exterior pressures of iss?
Great.why doesnt the water disapate into 1000s of droplets.
... it can't fall apart as there is nothing to make it fall, but it could drift due to air currents etc.
without gravity, where surface tension came from?
Yes, even neutral atoms can attract at close range because the positive and negative charges are not located at precisely the same locations; that's what chemical bonds and Van de Waals forces are about.These attractions cause very strong forces, including surface tension.Gravity is enormously weaker and will take orders of magnitude longer to make water spherical.
Quantum mechanics; the electron doesn't have enough mass to be localised to a very small area- it doesn't have a short enough wavelength, so it spreads out around the nucleus in a standing wave.Turns out these waves have lots of funky shapes, and some of these shapes can fit between each other, or even overlap each other and form a very strong chemical bond between two atoms.
in a hydrogen atom, there's 1 electron and 1 proton.there is only 1 force f=k x 1x1/r^2.what equation is hard to solve? what is that equation based on?
Quote from: gazza711 on 05/07/2015 16:04:02Water creates itself into a ball shape on iss?why?It's actually the same reason that bubbles do.The surface of the ball has surface tension, and that compresses the ball; the trick is; it turns out that the smaller the ball, the sharper the curvature, and so the higher the pressure inside it caused by surface tension.So let's take an example, suppose you break the ball into two, with one bigger than the other.Now touch them into each other, what's going to happen? The smaller ball is higher pressure, so it will decant itself, really quickly, into the bigger one, and the smaller one will shrink and the bigger one will grow until it's just one big ball.Similar things happen with smaller distortions, basically, the ball hates sharp curvatures, because that implies higher pressure, so the sharp curvature areas rapidly get the water squeezed out of them, and they disappear until it's all the same curvature/pressure.p.s. everything everyone else is saying in this thread is basically true as well, they're looking at it from a very high level view; what I've given is the worms-eye view of what's happening.p.p.s. there's a table of pressures versus radius (of curvature) here:https://en.wikipedia.org/wiki/Surface_tension#Surface_curvature_and_pressure
what reason? please be precise in science.what reason make electron standing waving around the proton?what reason keeps 2 particles under 10^40 g attraction force without stick together?