"Pressure of Liquids" Pressure PPT Courseware 2

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"Pressure of Liquids" Pressure PPT Courseware 2

1. Characteristics of liquid pressure

1. The liquid exerts pressure on the bottom and side walls of the container.

Study the pressure inside a liquid

If there is pressure inside the liquid, the film placed in the liquid will deform, and a height difference will occur in the liquid levels on both sides of the U-shaped tube.

2. At the same depth inside the same liquid, the pressure is equal in all directions.

Keep the depth of the probe in the water constant, change the direction of the probe, and observe the relationship between the pressure in the liquid in all directions at the same depth.

3． The internal pressure of the same kind of liquid, the deeper the depth, the greater the pressure.

Increase the depth of the probe in the water and see how the pressure inside the liquid is related to depth.

4. When the depth is the same, the greater the density of the liquid, the greater the internal pressure of the liquid.

Use different liquids to see if the pressure inside the liquid is related to the density of the liquid when the depth is the same.

Notice:

1. The definition formula P=F/S is used for solids, liquids and gases. However, since the pressure of the liquid is difficult to determine, we can first find the pressure, and then find the pressure.

2. The pressure of the liquid can be calculated by the formula P=pgh, and it is simpler to calculate the pressure generated by the liquid by F=PS.

As an example, someone said, "Imagine you extend one foot into the water outside in the Jiaolong submersible at a depth of 7 kilometers. The pressure of the seawater on your instep is equivalent to the gravity of 1,500 people!" Seawater pressure is really like that. Big? Please illustrate this with an estimate.

Class exercises

1. The pressure gauge is an instrument used to study ( ). When the metal box of the pressure gauge is placed into a certain depth inside the liquid, the observed phenomenon is the liquid level of the U-shaped tube. ( ) This phenomenon indicates ( ).

2. If two containers A and B contain the same liquid with the same mass, then the pressure of the liquid on the bottom of the ______ container is greater.

3． Three differently shaped containers with the same base area contain the same liquid of equal height. Which container experiences greater pressure at the bottom?

4. (1) A beaker is filled with water and a wooden block is placed in it. What will happen to the pressure at the bottom of the beaker?

(2) If an object is placed in a beaker that is not filled with water and the water does not overflow, what will happen to the pressure at the bottom of the beaker?

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Update Time: 2024-11-22

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 2 industry PPT template

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