Movement towards strength. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Movement towards strength. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

You know that sailing ships can move against the wind. Of course, this movement does not occur directly, "in the forehead" of the wind, but along a zigzag line. Let's do a simple experiment that will help you understand how this happens.

Take a long ruler and a triangle with 90, 60 and 30 degree angles. Put the ruler on the table and, having attached the triangle to it with its long leg, begin to press the hypotenuse with a pencil, as if sliding along it towards the ruler. The square under the pressure of the pencil will begin to slide along the ruler towards the small leg. By changing the direction of pressure with a pencil, it is possible to ensure that the triangle will move at a certain angle towards the force of the pencil.

Moving towards strength

In sailing ships and boats, with a headwind, the sails are set so that the wind creates a force that would move the ship forward and slightly to the side, but still towards the wind. And using skillful maneuvers, shifting the sails, acting as a rudder, they achieve that the ship continues to move forward, albeit in a zigzag line.

Author: Rabiza F.V.

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Italian secret to longevity 17.04.2016

In the Italian region of Campania there is a small settlement with a record number of centenarians: 20% of the townspeople celebrated their 110th anniversary and do not complain about their health. Scientists are looking for a clue to this phenomenon.

The small town of Acciaroli, located on the Mediterranean coast in the Italian province of Salerno, attracts tourists with its clean beaches: they have been awarded the prestigious Blue Flag award for their quality. Scientists are interested in the phenomenon of longevity: 300 out of 110 people living in Acciaroli have crossed the 78-year mark. This is an incredibly high rate. For comparison: in the US, the average life expectancy is 0,02 years, and only XNUMX% of the population lives to be XNUMX years old.

The riddle looks especially unsolvable given that the people of Acciaroli are not supporters of a healthy lifestyle: many of them smoke and are overweight. Sports are not very popular here: instead, the townspeople spend time in cafes, drinking coffee and wine.

Record longevity cannot be attributed only to excellent ecology or a good geographical location: fresh sea air and an abundance of greenery are characteristic of many regions of Italy. The same can be said about Mediterranean cuisine: its fans live not only in Acciaroli.

For many years, doctors have been taking blood tests and conducting DNA tests on the residents of this amazing city, but there is still no exact answer to the question posed. Scientists, however, found a slight difference in the diet of Italian centenarians: they use rosemary in abundance in cooking, and anchovies are the second most popular product.

But one should not think that everyone who includes these ingredients in their diet will automatically cross the century mark. Experts are increasingly inclined to the version of genes that are passed down from generation to generation.

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