Experiment of Galileo Galilei. Drawing, description

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Experiment of Galileo Galilei. Children's Science Lab

Children's Science Lab

“If you fill a glass ball with a narrow neck, only a straw thick, with water, and wrap it upside down, then the water, although heavier and falling rapidly in the air, will not pour into the air, but the air, capable, like the lightest body, quickly rises through water will not enter, and both substances will remain at rest against each other.

On the other hand, if the neck is dipped into a vessel with red wine, which is slightly lighter than water, then red trickles will immediately become noticeable, slowly rising among the water, and the water will flow out into the wine with the same slowness, without mixing with it, so that in the end the ball will be filled with wine, and the water will accumulate at the bottom of the vessel containing the wine.

Galileo Galilei experiment
Galileo's experiment on mixing wine and water

This is a quote from the famous work of Galileo Galilei "Conversations and mathematical proofs concerning two new branches of science related to mechanics and local motion" (1638). Although Galileo is considered one of the founders of the experimental method in science, historians of science have long believed that such an experiment is impossible: wine will mix with water, and the experiment described in the treatise should be considered mental. One of the researchers of the work of the great Italian even noticed, either jokingly or seriously, that the wine of those times apparently had other properties than modern Italian red wines, and in the XNUMXth century such an outcome of the experiment was possible.

And only relatively recently, the English historian of science James McLachlan decided to resort to the method founded by Galileo: he took two bottles of wine and water, connected them with a thin tube passed through the corks, and ... the result is visible in the pictures.

True, Galileo nevertheless somewhat idealized the description of the experiment: there is no complete immiscibility, after a while water and wine still mix a little with each other, obviously under the influence of shallow currents caused by small temperature and density differences, table vibration and other factors.

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Integration of electric vehicles with the home power system 24.06.2018

Audi will offer future owners of its e-tron electric cars an intelligent battery pack recharging system.

We are talking about the integration of an electric car with a home power system. The standard compact charger delivers up to 11 kW, while the optional Connect system doubles this to 22 kW. To use the Connect system, the car can be equipped with an additional charger. In addition, this system connects to the home infrastructure via a Wi-Fi network, working in conjunction with energy management tools (HEMS).

The combination of Connect and HEMS allows you to optimize the process of recharging an electric car, taking into account the most favorable electricity rates (for example, at night) and individual needs of the owner, such as departure time and required battery level. The Connect system receives fare information via HEMS or uses data entered manually by the customer.

If the household is equipped with solar panels, the charging process can be configured to give preference to photovoltaic energy. In this case, the weather forecast for the next few days is taken into account, as well as the current flow of electricity at the point where the house is connected to the mains.

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