Make your clothes waterproof. Fun chemistry experience at home

ENTERTAINING EXPERIENCES AT HOME
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Make your clothes waterproof. Chemical experiments

Entertaining experiments in chemistry

Entertaining experiences at home / Chemistry experiments for children

Dissolve in two liters of water 300 grams of borax, 120 grams of Glauber's salt and 80 grams of dextrin. Apply this solution hot to your clothes. Air dry without wringing, then iron with a hot iron.

At the same time, the fabric acquires water-repellent properties, as if it were saturated with oil: water runs off the clothes without wetting it.

Author: Shkurko D.I.

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Random news from the Archive

computer running on water 19.06.2015

Researchers at Stanford University have developed a synchronous computing system that operates on moving water drops. This was reported on the website of the educational institution.

The system is a set of T- and I-shaped iron plates stacked together, reminiscent of a maze from the Pac-Man game. The records are placed in a sealed "sandwich" of two glass panels, the space between which is filled with oil. Individual water drops with magnetized nanoparticles are pre-placed in the structure.

According to one of the inventors of the invention Manu Prakash (Manu Prakash), assistant professor at Stanford University, created a computer is a combination of the laws of fluid dynamics and the fundamental element of any computing system - the clock generator. At the same time, the creation of the last component turned out to be the most difficult task.

In order to make the drops move in the "maze" of iron plates and do it synchronously, the researchers built a device with a rotating magnetic field. As the magnetic field rotates, the polarity of the plates reverses and the droplets advance one step in a predetermined direction. Then another revolution occurs, and the drops advance one more step. Each rotation of the magnetic field is one cycle. The data reading system is a video camera that records the position of the drops at each moment of time.

Similar non-electronic computers are usually used in conditions where, for reasons of secrecy or because of the high power of electromagnetic fields, it is impossible to use technology based on a semiconductor element base.

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