The simplest spray gun. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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The simplest spray gun. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Take two thin glass or metal tubes. Insert one of them tightly into the cork of a small bottle with some liquid (water, cologne, varnish, paint). Put another tube in relation to the first one at a right angle. You will get the simplest spray gun. With this sprayer, you can spray the smallest drops of the liquid you need. Why does the liquid rise from the vial into the tube under the action of an air jet?

The simplest spray gun

Gases and liquids in tubes or in narrow parts of the channel pass faster, but the pressure on the walls of the tubes or channel will be weaker. In wide tubes or channels, the passage of gases and liquids will be calmer, but the pressure on the walls will be stronger. When we blow with our mouth or a rubber bulb into the free knee of the atomizer, then a column of air with reduced pressure appears above the tube dipped into the liquid. Atmospheric pressure drives the liquid up the second knee, leaving which the liquid breaks into tiny drops.

In technology, more advanced and powerful tools made by this method are widely used, which serve to cover surfaces with paint or varnish.

We recommend interesting experiments in physics:

▪ Absorption and emission of heat

▪ Pendulum and tricycle

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Random news from the Archive

Smart driver's seat responds to driver gestures 15.08.2015

Scientists from the Fraunhofer Institute for Silicate Research (Fraunhofer-Institut fur Silicatforschung ISC), as well as the company Isringhausen, which specializes in car seats, presented a fully functional joint development.

We are talking about a smart driver's seat, which is configured not with levers and buttons, but with brush gestures. The chair is equipped with a number of sensors, and the place where they are located is covered with a special synthetic material. To activate the sensors, the driver must touch the area on the side of the seat with their hand. This prevents accidental activation of the seat adjustment system. Then, using a series of intuitive gestures, the driver will be able to move the seat closer to the steering wheel or move it away, change the seating height, the angle of the backrest, the degree of lumbar support, and so on.

The creators of the chair claim that the whole process resembles the use of a touch screen in mobile devices, only the movements are more exaggerated. By adjusting the seat for themselves, the driver can save the settings in memory and return the seat to this position if the car is used by several people.

Initially, the system was designed for professional truck drivers who spend most of their lives on the road. But the developers hope that a variety of automakers will be interested in such a solution.

The prototype of the smart driver's seat will be presented to visitors at the 65th IAA Cars 2015 international commercial vehicle show, which will be held in the second half of September in Frankfurt.

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