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The 1 st picture is an example of Stevin's law, because there's nobody who exerts the pressure. the pressure on the body depends only on the depth (the height) of the water. The deepest water exerts more pressure on the body than the water on the surface.

The 2 nd picture is another example of Stevin's law, because there's nobody who exerts a pressure on the liquid. The water spills out in the same way in both containers because they have the same height, so the pressure at the bottom is the same; it doesn't matter how large the containers are.

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EXPERIMENTS- HQ VIDEOS BY HYDROINSANITY 

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EXPERIMENTS- HQ VIDEOS BY HYDROINSANITY 

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1° Experiment with balloon and pushpins
https://youtu.be/_czWMuwwkBQ

2° Pressure experiment
https://youtu.be/-T3UQGU8Ax4

STAY CONNECTED FOR OTHER QUALITY VIDEOS!

P.S. IF YOU WANT TO TRY A CATHARTIC EXPERIENCE, WATCH THEM WITH ENGLISH SUBTITLES !!

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On day 2 we have made a self - evaluation of the three answers we had written for homework. We've also evaluated our classmates' answers with marks from 0 to 2 points.
It's a useful activity to learn how to evaluate what we do, which is not so easy as it seems!

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For homework we've been told to find some applications of the principle of COMMUNICATING VASSELS in everyday life. We've found some really interesting examples of it: a group of italian designers developed a fantastic project called "Applied physics", based on the application of the most important scientific concepts to everyday objects and one of them is related to our topic.

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In the second lesson we watched a video about pressure and, in particular, PASCAL'S LAW and STEVIN'S LAW. Here's an explanation of Pascal's law.

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.1.Why snowshoes are much more effective for walking on snow?
2.Why does a sharp knife cut better than a dull knife?
3.Why a karate chop is much more effective than an open-handed slap?

1. Saying that pressure is equal to F/A, if we double the area the pressure will become half; with snowshoes the weight of the body is spread on a larger surface; that's why you walk better with snowshoes.
2. Considering the ratio P=F/A, if the force is constant and the area decreases, the pressure will increase so it will be easier to cut. In fact with a sharp knife, you put the same force in a certain point but with a lower area, so the pressure exerted is higher.
3. The force is constant, so if the area is smaller the pressure is higher; that's because pressure and area are inversely proportional.

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After a short explanation of the definition of HYDROSTATICS and some formulas (P=F/S), we've been told to answer some questions related to the ratio between PRESSURE, AREA and FORCE.

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WE'VE ALSO FOUND A SHORT VIDEO WITH AN ADORABLE AND SMART KID EXPLAINING THE COMMUNICATING VASSELS PRINCIPLE...HE NAILED IT!

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Nathan - Principle of communicating vessels