fluid-statics's questions - English 1answer

629 fluid-statics questions.

This doubt is about a conundrum which is common to multiple scenarios. One such scenario is this: The valve is opened and the high pressure air is pushed towards the water in the channel with the ...

On studying the Archimedes Principle,only one question arises in my mind these days. How does the Archimides principle work? I mean what happens at the molecular level in the fluids that they exert ...

I initially started to be interested in fluid pressure and pipes to learn electricity. It seemed the only way I could help my head to get around some electrical concepts. That's the reason of my ...

The speed of efflux is independent of area. Why would speed of efflux be independent of the area? Consider this, there is a cylinder and a hemisphere with radius of hemisphere equal to height of ...

What is the radius of water droplets which are forming slowly then falling from ceiling, under the effect of gravitational force only, the other conditions are standard (293K temperature, 1 atm air ...

Derivation of ideal pressure distribution in a Venturi meter This the flow in a Venturi meter for ideal condition: Since it’s ideal condition, $$\frac{v_1^2}{2g} + h_1 = \frac{v_2^2}{2g} + h_2 = ...

On earth if you submerge an upside down bottle into a pool or some large tub of water the bottle doesn't fill with water. I believe this is because of air pressure and air has nowhere to go. What ...

Let us imagine some amount of mercury $\left(\text{Hg}\right)$ contained in a cylinder. It is being rotated about the central axis at a constant angular velocity $ω$, and the system has moment of ...

Why don't automatic bird-waterer's water flow (spill)? Some physical explanation please.

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_{...

Yes air is less dense than water but how does the bottle know to rise or indeed to move? It's not electromagnetism I think. Does this have a relation to gravitational forces? Is it to do with the ...

The requirement here is something related with emptying two water tanks at different levels giving priority to one over the other. Real life scenario hers is about usage of harvested rain water which ...

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 ...

Compartments B and. Are closed and filled with air. The barometer reads 99.98 kPa . gages A read 206.8 kPa and height of D is 254mm as indicated. Mercury of s.g. 13.54 fill each U-tube gage. Find X ...

We have water flowing in an open channel. A small tube is placed in the channel, and the water raises to a height "l" above the water surface. The distance from the water surface to point 1/2 (points ...

in some exam questions I've looked at it is stated that the pressure distribution is hydrostatic, even though there is fluid motion. (In these cases the velocity has been constant over the section ...

I was solving this question :- And according to Me H=10cm is the answer. But the book says this:- Now , I don't understand **why does the liquid fall quickly on reaching top right corner?? ** One ...

Clouds are made up of tiny water or ice droplets, depending on temperature. This implies that cloud density is greater than that of dry air. Why don't clouds sink through their surrounding atmosphere ...

I recently purchased a little e-cig type device that operates on these "pods," they look like this: Now, as you puff on the device, the liquid is consumed and starts to go lower in the pod, at which ...

If a pin or any object is floating in water a force is needed to pull the pin away from the water in addition to gravity. My problem is that surface tension is something which makes the object float ...

I am aware that Pascal's principle says that if a pressure acts on an enclosed liquid, the pressure will be transmitted uniformly throughout the liquid. Can Pascal's Principle be applied to a ...

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 ...

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 ...

Why larger particles tend to remain at the bottom level of the test tube while the smaller particles form a layer above the larger particles?

If I have a 1.0m long cylindrical cup, and fill it up to $h$ = 0.5m with water, then the 0.5m of air above it will be at atmospheric pressure. But if I now place a perfect seal on the cylinder, and ...

See task description in the image below: The solution manual solves the problem by calculating the hydrostatic force halfway down the car door, i.e Isn't this incorrect? My idea was to calculate ...

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 ...

While I was trying to understand surface tension, I read in Wikipedia that, surface tension results from the greater attraction of liquid molecules to each other (due to cohesion) than to the ...

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 ...

My question is that what would be the rise in pressure due to the fall of water from a certain height to a partially filled pipe? To be more clear, an overhead tank is connected with a pipe and the ...

The resonance apparatus (shown below) is used to calculate the speed of sound using constructive and destructive interference of sound waves. While conducting the experiment, we continuously vary ...

if water is drawn from a tank by two pipes of the same diameter and at the same depth such that one pipe ends at some height and the other reaches the ground in which pipe we can collect the water ...

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 ...

For background :- Surface tension and capillarity I was reading the above answer. Particularly the sessile drop thing. I understand that as water is being pulled into the solid(assuming it is ...

Why do objects float in liquids denser than themselves? I know that a balloon floats on water because it has air in it, but why?

A Professor of Fluid Mechanics a told that the static temperature is the temperature observed when the relative speed between observer(thermometer) and fluid is zero. I have trouble understanding as ...

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 ...

If I place a cube in water, the force at the top of the cube, F1 will be Ahρwg. Where, A = cross-sectional area h = height at the top ρw = density of water g = acceleration due to gravity All this ...

I have a hemispherical vessel held against the wall, which holds water inside it. I had to calculate the net force required to hold this arrangement in equilibrium. The diagram is: Whatever ...

So, Thinking Again :/ If we built a tunnel, out into space far beyond our atmosphere and opened it up Would the resulting differences in pressure then effectively suck out the interior of our ...

I have tried as below: I choose surface element of hemisphere as $dA=r^2 d\theta d\varphi$,and force exerted on that is $dF=\Delta pdA\cos\theta\cos\varphi$,integrating leads to $$r^2\Delta p\int_\...

What happens when Reading of barometer when the space over Hg contains gas or vapour does it increase or decrease the height of mercury

Recently, I had watched one of the viral videos on the internet about an unconventional way of fishing using banana trunks. I am unable to see what is driving the flow of water? Is it a 'plain ...

Please identify what is wrong with my reasoning and help. There is a liquid in a container. it's topmost layer is stationary , macroscopically as seen from outside. This means there is no net force ...

*note, no friction in hinge, massless gate and width of gate is 1mImagining a free body diagram, there should be 3 components the resultant force due to the ...

I wonder why the pressure is exponentially within the atmosphere but (almost?) linear in the sea?

I was reading the topic of contact angle from a book and I couldn't exactly understand it. The first photo depicts the general case when a solid surface touches a liquid surface. $Fs$ is the adhesive ...

If someone dropped a feather onto a dense cloud, would it hold it? Or would it drop through the cloud? If it holds it, could a piece of thread rest on top of a cloud? What would be the maximum weight ...

I was reading about why lifting an object in water is easier then in air. The explanation goes on the line that the water which was above the object will fall downward and sideways, taking the place ...

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