Bubble. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Bubble. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

You have probably done this fascinating business more than once - blowing soap bubbles. It's not just fun. On soap bubbles, scientists studied the structure and behavior of thin films, studied the forces of surface tension. The thin film of a soap bubble shimmering with all the colors of the rainbow was the subject of research and reflections of the great physicist Isaac Newton.

When blowing a soap bubble, the surface tension forces of the soap solution form the shape of a ball. The bubble film is very thin, and yet, despite this, it consists of three layers: two layers of soapy water, and between them a layer of almost pure water.

Any soap is suitable for blowing soap bubbles, but the strength of the bubbles depends on the content of various substances in the soap. The content of glycerin in soapy water has a particularly good effect on strength. It is recommended to take distilled water, you can use clean rain water, melted snow or water that forms when the refrigerator is defrosted.

Of the varieties of soap, a simple laundry soap gives the best result. A long straw is recommended as a tube, but you can take spent ballpoint pen refills, after cleaning them from the remnants of the paste, and other plastic thin tubes. The ends of the tubes need to be split a little. And to blow a bubble in a bubble, you need to use another tube, but with a whole end. Before piercing the first bubble, be sure to moisten the tube with soapy water. This is where the strength of the soap film is of particular importance.

In addition to blowing bubbles, it is interesting to observe soap films stretched over frames made of wire, on frames consisting of such frames. Frames can be made of wire in the form of various geometric shapes. They should be small so that they can be easily dipped into a cup of soapy water. First, the frame must be washed well with soap so that particles of fat do not remain on the wire. When you remove the frame from the soapy water, all of its frames are covered with a soapy film. Try to pierce one of the surfaces - and you will see that the film will take on a completely different look, but in such a way that its surface area will again be the smallest possible.

Soap bubbles

It is interesting to observe the soap film in the form of a screw. For this, a special frame is made. Around a piece of wire, another wire is arranged in a helical fashion. Its ends are fixed on the first wire that it wraps around. When lowering such a frame into soapy water, a beautiful helical film forms on it.

Author: Rabiza F.V.

We recommend interesting experiments in physics:

▪ Needle-lightning rod

▪ Bird's trick

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We recommend interesting experiments in chemistry:

▪ Glow of solids

▪ Crystals are especially beautiful specimens

▪ Testing fruit juices for sugar

See other articles Section Entertaining experiences at home.

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