The hydrostatics tag does also apply to fluid-statics.

learn more… | top users | synonyms

2
votes
3answers
416 views

Question about buoyancy

I took an empty clear sphere with radius r, put some weight inside this sphere, and put in into the water. I calculate the buoyancy force as: Volume of the sphere = Volume of the water displaced ...
0
votes
2answers
77 views

Is the force exerted by the container on the fluid and the force exerted by the liquid on the container equal?

I came across a question where i was asked to find the force exerted by the walls of a frustum shaped bucket on a liquid inside it . I found the force exerted by the liquid on the walls of the bucket ...
0
votes
2answers
159 views

Given a slanted pipe

Question: I have a pipeline that is tilted. I know the length of the pipeline, and the pressure (90psi) that is felt at the very bottom. I'm trying to find out how much liquid has leaked out if the ...
0
votes
1answer
158 views

What is the physical fundamentals of Pascal's law

Pascal's law or the principle of transmission of fluid-pressure (also Pascal's Principle) is a principle in fluid mechanics that states that pressure exerted anywhere in a confined incompressible ...
0
votes
1answer
79 views

Given a wall on planet earth with a constant height is there a point at which a physicist needs to worry about the volume of water behind the wall?

I have a quick question, on the media outlet "Sploid" a post recently came out about this interesting flood wall in Austria that keeps water from destroying a community. The wall seems to contain a ...
2
votes
0answers
176 views

The highest density of water

If temperature is decreased, volume decreases. so density increases. But in case of water, its density increases up to 277 K, then decreases. Why does this happen? Why 277 K is water's highest ...
2
votes
0answers
93 views

Stat mech explanation for separation of one liquid from another in gravity?

If one mixes two distinct ideal gases above the Earth's surface, one with a higher molecular mass than the other, then at equilibrium, their number density gradients will be such that at low heights, ...
1
vote
0answers
497 views

Under what conditions does Jurin's law work? (and what are its physical basis?)

I searched answer in wikipedia (and other sites) but I found disjointed and contradictory informations. In Jurin's law article they say that the law works if the radius of the tube is smaller than ...
1
vote
0answers
59 views

Solving inhomogeneous Stokes equation

I want to solve the Stokes inhomogeneous equation, i.e. $$\nabla^2 \vec v -\nabla P = \vec f(r,\theta)$$ $$\nabla\cdot\vec v=0$$ where $\vec f$ is irrotational, i.e. $\partial_y f_x - \partial_x ...
1
vote
0answers
249 views

Horizontal Capillary Question

I have a fluid mechanics question, that I think is caused by a lack of understanding of some key concepts. Suppose we have a horizontal capillary with a radius of 10um. The fabrication process has led ...
1
vote
0answers
122 views

Problem in average height

Let, diameter of cylinder hole of height 30m and diameter 2m filled with water. In a book, when author tried to find out the power for lifting all of the water then he used average height. why is ...
0
votes
0answers
6 views

What liquid has the lowest known solubility of O2 at 20°C, 1 atm?

I have recently started a project on hydropneumatic devices, i.e. devices that use hydraulic fluids in conjunction with high pressure gases. In such systems, the most immediate thing you would want ...
0
votes
0answers
16 views

general formula for water pressure

In a Sears & Zemansky Physics text, a general formula for fluid pressure is introduced. An infinitesimal element is created in the fluid with thickness $\mathrm dy$ and surface area $A$ at a ...
0
votes
0answers
15 views

Is there a relationship between maximum flow rate of a fluid through perforations in a cavity and the flow rate of the fluid in the cavity itself?

I have a scenario where water is flowing horizontally through a (rectangular) cavity. The underside of the cavity has a set of perforations that look something like: and I need to determine the ...
0
votes
0answers
9 views

Siphon and a pressure gradient

It's claimed here that the pressure gradient is what sustains the flow in a siphon. But I'm not really accustomed to the term and don't see why it forms and why it sustains the flow. Can you please ...
0
votes
0answers
30 views

Liquid pressure confusion

Water molecules are free to move around and they collide with the walls of the container in which they are kept.So,as a result they should exert pressure on the walls.But, while calculating force ...
0
votes
0answers
74 views

Calculating rise in water surface due to a charged capacitor

Two metal plates separated by a distance d & initially charged with charge +Q & -Q are kept so that it just touches the surface of a very large water tank as shown in figure a. Thus water ...
0
votes
0answers
172 views

Hydrostatic forces

I've started learning hydro static force system right now. I have problem understanding one thing. In the picture I'm looking for the forces on the black lines: A part is making the purple force above ...