Questions tagged [fluid-statics]
Fluid statics or hydrostatics is the branch of fluid mechanics which deals with the study of fluids at rest and the pressure exerted by it on an immersed object. If your question is about the study of fluids in motion, use the tag "fluid-dynamics" instead.
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Using the Bernoulli-Equation for a Hagen-Poiseuille problem [closed]
I think I am using the Bernoulli-Equation wrong in order to solve a problem that requires the Hagen-Poiseuille-Equation. I carefully used the Bernoulli equation in each step, and yet my solution is ...
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Mechanism behind fast air having lower pressure
I understand that one of the consequence of what Bernoulli's law describes is that fast moving fluids exert a lower pressure compared to slower moving air. In the above diagram, therefore, blowing ...
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Does the pressure at the bottom of a container change if I place a wooden block on it or pour an immiscible floating liquid on it? [closed]
What is pressure after all ? What is the cause of pressure at the molecular level ? Collisions ? Weight of whats on top?
Does the pressure at the bottom of a container change if I place a wooden block ...
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Archimedian principle on edge cases [duplicate]
Here is the following Gedankenexperiment: Suppose I have a perfect half-ball and it has lower density than water. Then, I have a plane at the bottom, with water on top. If I now place the half-ball ...
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Why do condensation droplets on my window show a size gradient?
This morning I noticed this pattern of water droplets on my window, which I assume is due to condensation:
The bottom of the image corresponds to the bottom of the window, and the entire band of ...
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Why is the pressure at all points on the same horizontal level in a connected homogenous liquid which is unaccelerated horizontally equal irrespective [duplicate]
.. of the shape of the container.
I have looked for the proof of this but it is all done assuming the shape to be cylindrical. What if the shape is round or irregular?
The pressure due to horizontal ...
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Molecular mechanism of surface tension
I have studied physics up to high school and at that time I was always confused about the origin of surface tension force. I found the explanations given in my textbooks to be extremely vague and ...
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Pressure of liquid in a problem related to capillary tubes from 200 Puzzling problems in physics
I was going through the book 200 Puzzling Problems in Physics. I have a doubt in the solution given to Q29.
P29. Water which wets the walls of a vertical capillary tube rises to a height $H$ within ...
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Air inside of a suberged upside-down bucket
I have a case where I have a system that can send compressed air (up to 6 bar) down a hose to an upside down bucket placed around 30 meters depth. The shape is more like an ellipse, but for this ...
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Why isn't $N=mg+p_0S$? [duplicate]
Imagine a cube is lying on a table. Then the forces acting on it are: $mg$, $N$, but also the atmospheric pressure. It presses on the top and the side faces. It doesn't press on the bottom face since ...
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Cheerios force, nanotechnology [closed]
So apparently , I had thought that is, can Cheerios effect used for like controlling nanobots & nanoparticles in a fluid environment?
I do not have much knowledge on this topic but I am very ...
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Fluid in a rotating cylinder: how is this wrong?
I have recently been working a bunch of hydrostatic problems with accelerating fluids of all kinds. I came across the classic problem of finding the shape of the free surface of a fluid in a rotating ...
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Why is the Stress Tensor a Diagonal Matrix for Static Fluids?
I am studying fluid dynamics and there is a section in our textbook that handles fluids at rest. It starts by mentioning that for fluids at rest ($\vec{v}=0$) the sheer stresses have to vanish and ...
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How are the force expressions (body weight, additional weight, and buoyant force) formulated and related in a fluid statics problem?
In fluid dynamics class, I saw a statics problem that dealt with buoyancy using Archimedes’ principle. The problem stated the following:
A wooden plank with a cross section of 7.5 cm × 30 cm and a ...
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Force due to fluid on curved surface of cylidner [closed]
The situation is shown in this image. I have to find the net force by the two liquids on the left curved surface of the cylinder.
I tried this - if we consider a section of height $dx$, immersed in ...
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