"Atmospheric Pressure" Pressure PPT courseware 5

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"Atmospheric Pressure" Pressure PPT courseware 5

Think about what the Magdeburg Hemisphere Experiment showed?

(1) Proves the existence of atmospheric pressure

(2) And the atmospheric pressure is very strong

Conclusion: Through the above experiments, we understand the existence of atmospheric pressure

Think about it: why does the atmosphere produce pressure?

Explanation: The atmosphere and liquid are both affected by gravity and are fluid, so they can generate pressure just like liquids!

Explain in terms of atmospheric pressure:

(1) Use a plastic tube to suck the drink in the cup into your mouth

(2) The pen absorbs water

(3) The medicine enters the syringe

Summary: All processes of pumping liquids are processes in which atmospheric pressure "presses" the liquid up.

discuss:

(1) If the glass tube is tilted, will it affect the results? Why?

(2) Will changing to a thicker or thinner glass tube affect the results? Why?

(3) If some air leaks in, will it affect the results? Why?

(4) When mercury is added to the tank, does the height of the mercury column change? Why?

(5) If the outside atmospheric pressure changes, does the height of the mercury column change? Why?

Summary

1. The pressure of the atmosphere on objects immersed in it is called atmospheric pressure

2. The Magdeburg Hemisphere Experiment designed by Otto Glick proved the existence of atmospheric pressure.

3. Torricelli’s experiment measured the value of atmospheric pressure, which is about 105 Pa.

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Update Time: 2024-11-30

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

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