fluid-statics's questions - English 1answer

658 fluid-statics questions.

My points of interests is at point A and B. I want to investigate how much pressure is acting on this two points. (Ignore Atmospheric pressure and work in gage pressure). Since the oil will flow up ...

I read that, Angle of contact decrease with the addition of impurities whereas it increases if the temperature is increased For the explanation of why it increases with increase in temperature, I ...

I have some doubts on inverted U manometer. In the picture there is one U inverted manometer, the space above the liquid in the manometer is filled with air which can be admitted or expelled through ...

Given a liquid (e.g water), flowing throug a pipe with D1, P1 and v1 as its diameter, gauge pressure and velocity respectively. If we then add a gate with smaller diameter d in the pipe without ...

I am a newbie in water system design but I am currently faced with the exact situation below on my land, and I need to know whether gravity alone is sufficient in order to fill Tank 2 from Tank 1, as ...

I can't seem to find the answer to what should be a trivial question: I have a rigid air-tight container of fixed volume and I am pumping air inside. The pressure is increasing (very slowly) from ~...

According to Wikipedia, contact angle depends on the hydrophobicity of the surface and on thermodynamic equilibrium. But how does it in theory depend on the drop size? In other words, how would a ...

In Kundu's book , 4ed, P21, they define the potential density $\rho_\theta$ like this: However, later in P22, they define the potential density gradient as It seems to me that the potential density ...

why does the pressure exerted by liquid on side walls increases with depth? please explain in detail.Thanks in advance

I cannot understand the concept of fluid pressure. Consider a liquid molecule at some point inside a liquid vessel. All the other molecules which are in contact with this molecule will exert normal ...

Specifically, I am trying to wrap my head around this scenario but can't do so solely by thinking about the weight of the fluid. Imagine a perfectly still lake. If you dive into the lake, the ...

Suppose I have 2 fluids of different densities, and I pour the same mass of each fluid into 2 identical cups. I feel like I'm confusing myself here — on one hand hand, both cups contain the same mass ...

Suppose you have a glass of water at room temperature. Now suppose you put the glass of water on a weighting scale. What the quantity actually measures ? I have read that in fluids are basically lots ...

Consider the momentum balance equation for a steady inviscid flow $$\int_S \rho \mathbf{v}(\mathbf{v}\cdot\mathbf{n})\ dS = -\int_S p\mathbf{n}\ dS\ +\ \int_V \rho \mathbf{g}\ dV\ +\ \mathbf{F}$$ ...

Considering the ideal gas law , where pressure is always positive, i wonder : How can gravity turn a gas into a star? Yes gas has mass too. But a light gas obeing the ideal gas law seems ...

Suppose I have an U shaped tube, and I fill the left side with mercury and right side with water. Also I take another U shaped tube, and fill it with water completely, as shown in the below picture: ...

Consider a rotating centrifuge and a reference frame rotating with it. On every "piece" of fluid inside a centrifuge acts centrifugal force, but what are the other forces that make every piece stay in ...

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 ($V_{...

I have read these questions: Hot air balloon trajectory predictions Do atmospheric physics prevent hot air balloons from ascending over 60,000ft? What is precisely the reason that a helium balloon ...

If I have a solid rigid body (let us call it a duck) in a static regime submitted to the forces of pressure $P$ of a fluid (no shear forces) I can easily calculate the total force $\mathbf{F}$ exerted ...

I'm not a physicist, but I was wondering: Can ants walk on dense liquid like mercury and why?

This is a problem on Brilliant.org which asks, if you want to receive 400kPa of water pressure to a house that is at the foot of a water tower, how tall must the water tower be? It provides you with ...

In the picture, the plastic bag is filled with water. The sharpened pencil penetrates through the bag. However, there is no leakage. Could you please explain why this happens?

I know the basic law of flotation for a body in a fluid , but when it is subjected to a constant force at any point of the body along which point the moment will be created ? I have a confusion ...

First of all: I'am not a physicist or anything close to it. I jhust enjoy to think about certain thinks in a different way and to ask for a much more detailed "how". So here is what keeps me from ...

Consider a system as illustrated below: There are two 55 gallon barrels used to store water coming down the gutter. These barrels are connected together on the bottom to maintain equal water level ...

Some presentations of the virial theorem are mechanical (see this page by John Baez for an example). They assume that there is a system of point particles interacting only via Newtonian gravity (along ...

I have such a weird misunderstanding about liquid pressure . On the diagram , I have two weightless and frictionless piston on the two openings of the container. There's atmospheric pressure on both ...

I am constructing a gravity flow water system. I have 100ft point where I can put my tank. My question is does the size of my tank matter? I am using a 1" pipe. Will I get more pressure if I use a ...

So I'm doing some water hammer analysis and was calculating bulk modulus of water as a function of temperature. I took the speed of sound and density of water as functions of temperature and ...

Rings, D., et al. Theory of hot Brownian motion. Soft Matter 7.7 (2011): 3441-3452, doi:10.1039/C0SM00854K. In this paper the author has mentioned that vorticity diffusion is disregarded due to it's ...

For many years I have wondered about the physics in a scene from the James Cameron movie, "The Abyss", where a submersible sinks because of small leaks caused by a crash. In this scene, Ed Harris' ...

I will soon conduct some experiments on compound channel in unsteady flow case. The flow velocity will be measured using acoustic Doppler velocity. I'd like to have your thoughts about what I'm ...

Pretty self explanatory title. But I just read in a book that the surface tension remains same even if the surface area is increased. What could be a possible explanation for that?

I know the expression for excess pressure inside a LIQUID DROP is : $$ P_2 - P_1 = 2S/R $$ where $P_2$ is the pressure just inside the liquid drop and $P_1$ is the pressure outside the liquid drop ...

A spherical shot of W gm weight and radius r cm, lies at the bottom of cylindrical bucket of radius R cm. The bucket is filled with water up to a depth of $h\,\mathrm{cm}$ $\left(h > 2r\right).$ ...

Are there materials (possibly in research stage) which are investigated as replacement for piping and pumping systems in construction work to transport water from the ground to elevated floors in ...

Suppose that we want to obtain liquid pressure in the below figure which is filled with water: I don't know why I get to two different answers with two different ways: Get the cube and cylinder ...

I was recently studying applications of Bernoulli Equation and came across the Ventury tube. This is diagram I have used to analyse the venturimeter. I understand how we obtain the first equation ...

I wish to explore a slight modification of a well known result found in several physics texts - Torricelli's Law of Efflux. The most common problem on the above result has the following setup: The ...

Assume a spherical drop. The force equilibrium writes, since the divergence of the stress tensor is null and the stress is isotropic: $$ \nabla \cdot (\underline{\underline{\sigma}})=\underline{0}\...

A fluid in equilibrium is trapped inside a cube, outside the field of gravity. If a force F acts upon the centre of every seat of the cube via a piston of area A, what is the total pressure in the ...

Can someone tell me what will be the velocity profile in orifice meter?I am confused about the downstream side velocity of fluid.What i am thinking is downstream there is a pressure loss in the ...

I want to calculate the under water pressure, taking into account the compression of water. I derived a formula, but apparently the function has a vertical asymptote, meaning that the pressure ...

I'm aware that the difference in density with respect to height is low, but I'm in need of the values for a project: in which I explain that the continuity equation of fluid dynamics will work well ...

If an object was dropped into water from two different heights, assuming that it doesn't hit the bottom, would the terminal velocity be different?". Suppose that container has a lot of depth that it ...

According to Wikipedia: The Earth is not spherically symmetric, but is slightly flatter at the poles while bulging at the Equator: an oblate spheroid. There are consequently slight deviations in ...

What is the molecular explanation of Pascal's law? Let us now consider what happens when we change the pressure on a fluid contained in a vessel. Consider a horizontal cylinder with a piston and ...

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