Why is the same high pressure in water equal?

Well, I think the upstairs [duodamo] classmate explained it incorrectly!

The landlord asked how to derive the pressure in any direction, and Duodamo didn't get to the point. In fact, the landlord can assume that there is an L-shaped catheter filled with liquid, and the pressure at the lower end of the catheter, i.e., the horizontal outlet of the "L" shape, is equal to the vertical pressure at the right-angled apex of the "L" shaped catheter. Because if the pressure at these two places is not equal, there will be liquid flow (unbalanced force), and the pressure at the right angle point and the pressure in the vertical direction p = gh, this landlord has no doubt, right?

Now by analyzing it, we can prove that the pressure in the horizontal direction is also Gh, and in the same way, we can bend the angle of the L catheter to prove that the pressure in any direction is Gh.

Isn't it said in the book that pressure is generated? p=f s, and the pressure of the liquid is macroscopically caused by its own weight. As for the pressure generated by molecular collision mentioned by Duodamo, it is true that the pressure of gas is generated in this way, but for liquids, the movement of liquid molecules is limited to a range, and the direction of pressure is also relatively messy, mainly because the molecular gravity and molecular repulsion are relatively balanced, and the movement of molecules is not almost completely separated from the influence of molecular gravitational potential energy like gas, so it is difficult for liquid molecules to rely on collision to produce a more obvious pressure on the container wall.

When gravity is lost, atmospheric pressure is basically non-existent, so the liquid does not flow out not because of atmospheric pressure, but because of surface tension. It is equivalent to a capillary phenomenon.

The opinion on the first floor is not so true. The landlord asked how to push in any direction? The landlord can imagine that the liquid is surrounded by obstacles (container walls), and since there is no place to squeeze it, it will push in the opposite direction, and according to the principle that the force is reciprocal, the pressure on each surface is generated after countless actions.

Both atmospheric pressure and water pressure exist due to gravity. Without gravity, there is no water pressure and no atmospheric pressure.

The formula is pressure = water density * water depth * g (gravitational acceleration), so the pressure in the water at the same height is equal everywhere, which is only related to the depth of the water.

is the intermolecular repulsion; Apparently it doesn't flow out because of atmospheric pressure.

The direction of the pressure of the liquid is a property and cannot be deduced.

The pressure of water is gravity, as well as the fluidity of the liquid.

Again, liquidity is a nature and cannot be deduced.

Diffusion is not evident in liquid and solid states. Understand the pressure of the liquid, please do not consider this aspect.

Forcibly help you clear your mind:

The liquid is acted upon by the force and moves in the direction of the force as a whole. And because the liquid is fluid, it will flow.

Therefore, it has a force on objects that collide in all directions.

Nature is important, please understand carefully.

p = density times g times h density must be the height must be equal to the pressure I didn't understand your supplement I read in the book about surface tension you look at 8 (only for junior high school) Liquid surface tension is the specific manifestation of intermolecular force on liquid, and intermolecular force has a certain law: intermolecular gravitational force and repulsion force always exist at the same time, and both gravitational force and repulsion force decrease with the increase of intermolecular distance. However, the gravitational force decreases slowly, so that when the intermolecular distance exceeds the equilibrium position, the intermolecular force is manifested as tension The macroscopic manifestation of a large number of intermolecular gravitational force on the surface of the liquid is the surface tension of the liquid, and the surface of the liquid is reduced as much as possible under the action of the surface tension of the liquid.

The distribution of molecules in the surface layer of the liquid is sparse than in the interior.

In addition to repulsion, the intermolecular force also has a gravitational force, when the water is subjected to external forces (gravity, wall force) it is repulsive, and in the case of weightlessness, the water intermolecular force is gravitational, so the water can appear spherical under absolute weightlessness.

You can think of the fluidity of the water when you squeeze the bottle, and it has nothing to do with air pressure, if you don't have gravity.

That all the pressure is not there.

In layman's terms, the deeper the water level, the more water above it, the heavier it is, and the greater the pressure. Because of this, the water pressure is determined by the depth of the water. i.e. p = density x acceleration due to gravity x vertical height.

Because the deeper the water, the closer the inner center of the earth, and the closer it is, the greater the pressure, so the deeper the water, the greater the pressure.

The relationship between the three is: absolute pressure, relative pressure, and vacuum.

Pressure calculation formula].

First of all, you have to know that one is the absolute pressure and the other is the gauge pressure, and the absolute high leakage pressure minus the atmospheric pressure is equal to the gauge pressure.

In junior high school, the calculation of the spring style p=pgh is actually the gauge pressure, so the absolute pressure at the beginning of the underwater h must be added to the atmospheric pressure. What should be compared in this question is the absolute pressure, that is.

P1 + PGH1 = P2 + PGH2 where P1 is the ambient atmospheric pressure, H1 is the depth of the test tube nozzle from the water surface outside the tube, P2 is the gas pressure in the tube, and H2 is the depth of the liquid level in the tube from the nozzle. Obviously, P2>P1 is because the pressure of the water is compressed by the gas in the pipe.

Let's start with the relationship between water depth and pressure, p= gh

It is easy to see that the pressure is proportional to the depth of the water.

Next, we will talk about the horizontal velocity of water ejection and the relationship between pressure.

First of all, the water above the cross-section of the mountain where the small hole is located is regarded as an overall water pressure * bottom area of the container = the pressure of this part of the water below.

High confidence of pressure * decrease = work done by pressure = decrease in potential energy of water.

Whereas, the bottom surface of the container and the rotation * the height of the drop = the volume of water decreased.

So, the work done by pressure = the pressure of water at the position of the pore * the volume of water reduced = gh * v = mgh

Summary. If it is the pressure on the container or the surface, it is true that the larger the volume, the greater the pressure.

Hello, I have seen your question and am sorting out the answer, please wait a while Oh It depends on the pressure of what.

The pressure in the water is related to the depth and not to the volume.

If it is the pressure on the container or the surface, it is true that the larger the volume, the greater the pressure.

If two volumes are of different sizes, and drill a small hole at the same height, whether the distance of the water spray is the same.

This is the internal pressure of the water.

As long as the height is the same.

It's the same with pressure.

It has nothing to do with volume.

I know if the distance is the same?

It's the same with distance.

The pressure is the same, and so is the spray distance.

Thank you. You're welcome, I hope to give a thumbs up.

Question 1. Analysis: First of all, what is the cause of the pressure? We say that the reason for the pressure is "unit face."

The pressure generated by the atmosphere is related to the air subjected to gravity, the air above the atmosphere at the same altitude.

The gas mass is the same, so the force per unit area is also the same, i.e., p=f s, f and s are both phased.

At the same time, the pressure p is the same. In the same way, the pressure of water at the same depth is the same.

Is the pressure also equal at the same level? According to: f=ps, the pressure p at the same level is the same, so it depends on whether the force area s is the same, if it is the same, the pressure f is the same, if it is different, the pressure.

f is also different. Question 2.

Analysis: We know that the pressure of gases and liquids is related to the flow rate, why is that? To put it simply, when the flow rate is fast, there is less material here, and the surrounding matter has to fill here; If from the pressure.

The definition of p=f s is that when the flow rate is fast, the mass of the substance here is less, so the force f is small, when s is not.

When changing, the pressure p is smaller, so the pressure is lower where the flow rate is fast. That's the real reason why it came about.