On the question about liquid pressure, on the question about liquid pressure

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The liquid pressure formula can only be used to calculate the liquid pressure.

The formula for solids can only be counted as solids.

It cannot be mixed. By: Sub Bullet - Rookie Level 5 3-31 19:

38 No, because the density of solids and liquids is not the same and the shape is not the same, so you can't use the same formula to measure it The formula for solid pressure is: p=f s The formula for liquid pressure is: p=p (liquid density) g(g = or about = 10) h (liquid height), and there is a lot in the third volume of junior high school.

No, because the density of solids and liquids is not the same and the shape is not the same, so you can't use the same formula to measure the solid pressure formula: p=f s The liquid pressure formula is: p=p (liquid density) g(g = or about = 10) h (liquid height), junior high school volume 3 has it.

To study physics is to have a physical mind, it's not mathematics, so you can't just look at it in terms of formulas.

First of all, p=f s is the definition of pressure, which means that it will always apply.

About the pressure of the liquid, you have to know that this pressure comes from **.

This pressure, in the end, is caused by the gravity of the liquid (which is negligible compared to the pressure caused by the tension of the liquid) (you can imagine whether there is pressure at a certain height in the liquid without gravity).

Because of gravity, the liquid always wants to go down, and if you can't go straight down, you can go left and right first, and in short, you have to keep the whole thing down, and if you learn about potential energy in high school, it's easier to understand, just like a faucet dripping water on a flat surface, and the water always spreads out, rather than becoming a column.

Because of gravity, the liquid will try to go down in all directions, and if it doesn't, then there's pressure, and that's the pressure (if you can figure out why there's pressure in the liquid upwards, that's really it).

The magnitude of this pressure.

From the above, 1) the pressure is caused by gravity, so the magnitude must be related to gravity.

2) All directions are equivalent, so the pressure in all directions in a liquid is equal.

Because all directions are equivalent, so we can study the magnitude of the pressure in the most special case, which is the regular container, and the process is omitted.

So this formula works in all directions, not just downward pressure.

Your question 1: If an irregular container, for example, has a trapezoidal plane, and its walls are oblique, because we know from above that the pressure is in all directions, then the pressure on it is also oblique, isn't it? The support force of the wall to the water is also oblique.

If you take a diagram of the force, and you can see that the pressure of the liquid on the bottom of an irregular container can be equivalent to the pressure on the bottom of the cylinder, which is the same as the pressure on the bottom area.

Question 2 Think for yourself.

I went to code so many words and admired myself).

Irregular containers can be turned into an infinite number of regular containers.

The bottom can be seen as a plane with differential thinking, and the pressure at a certain point below the liquid surface is in all directions (similar to the spherical diameter).

1. The liquid can transmit pressure in all directions, so the irregular pressure is the same as the regular pressure.

2. The pressure of the liquid in the irregular container to the bottom can be calculated by P=F S, not that it cannot be used, pay attention to the pressure of F on the bottom of the container.

The pressure is only related to the density and depth of the liquid.

The sulfuric acid mass is the largest, and the brine mass is the smallest.

Imagine that the brine is subjected to downward pressure on the wall and the sulfuric acid is supported upwards by the wall, and the result is that the same pressure is measured. It can be seen that the mass of sulfuric acid is the largest, and the mass of brine is the smallest.

First of all, the unit is unified, that is, 500 square centimeters are converted into cubic meters, because v s (volume divided by the bottom area) is equal to 5m, that is, the height of the container. Then you set the weight of the liquid to be m kilograms (10m newtons), and because p = f s, the equation is: 10m + 15n square meters = 1800p, calculate m = , and then because the volume of the bottle is cubic meters, the bottle is filled, so the volume of the liquid is cubic meters, and because the density = m v, so the final density of the liquid is cubic meters.