# fluid-statics's questions - English 1answer

658 fluid-statics questions.

1 answers, 24 views pressure fluid-statics
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 ...

### -1 Angle of Contact with change in temperature or addition of impurities

2 answers, 3.805 views surface-tension fluid-statics
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 ...

### 5 Inverted U manometer

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 ...

### Fluid Mechanics - The Maximum Flowrate of A Liquid Thourg a Pipe if There is Sudden Reduction in Diameter

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 ...

### 13 Is there a way to fill Tank 2 from Tank 1 through Gravity alone?

2 answers, 22.011 views newtonian-gravity water flow fluid-statics
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 ...

### 2 How does the bulk modulus of air change with rising pressure?

2 answers, 7.748 views pressure ideal-gas volume fluid-statics
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 ~...

### 5 Does the contact angle of a drop depend theoretically on the size of the drop?

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 ...

### The link between two definitions of “potential density”

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 ...

### fluid statics doubt (regarding free body diagrams)

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

### 2 What is fluid pressure?

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 ...

### 2 How does the vertical distance beneath the surface of a fluid create pressure? (thought problem)

4 answers, 407 views pressure hydrostatics
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 ...

### Pressure of the same mass of fluids of different densities?

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 ...

### 1 What's measured by weighting a fluid?

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 ...

### Hydrostatic pressure distribution balancing the weight of the fluid

1 answers, 207 views fluid-dynamics hydrostatics
Consider the momentum balance equation for a steady inviscid flow $$\int_S \rho \mathbf{v}(\mathbf{v}\cdot\mathbf{n})\ dS = -\int_S p\mathbf{n}\ dS\ +\ \int_V \rho \mathbf{g}\ dV\ +\ \mathbf{F}$$ ...

### -1 Star formation from gas? [closed]

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 ...

### -1 Why should pressure be same at same height?

2 answers, 54 views pressure fluid-statics
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: ...

### -1 The other force in centrifuge

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 ...

### fluid trapped inside cube without gravity

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 ...

### -2 Velocity profile of Orifice meter

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 ...

### Pressure under water considering bulk modulus

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 ...

### 1 The approximate values of density for a flame with respect to heights

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, so that it doesn't hit the bottom, would the terminal velocity be different?”

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 ...

### Is effective gravity constant over the surface of the ocean?

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 ...

### 1 What is the explanation of Pascal's law at molecular level?

1 answers, 231 views pressure fluid-statics
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 ...