Apple momentum. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Apple momentum. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Cut the apple in half, but not all the way through, and let it hang on the knife.

Now hit with the blunt side of the knife with the apple hanging on it something hard, like a hammer. The apple, continuing to move by inertia, will be cut and split into two halves.

apple inertia

Exactly the same happens when chopping firewood: if it was not possible to split a block of wood with one blow, they usually turn it over and, with all their strength, hit the butt of the ax on a solid support. Churbak, continuing to move by inertia, is planted deeper on the ax and splits in two.

Author: Rabiza F.V.

We recommend interesting experiments in physics:

▪ Water hammer

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Random news from the Archive

Created the strongest acid 18.07.2005

At the University of California (USA), with the participation of employees of the Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk), an acid has been created that is a million times stronger than concentrated sulfuric acid. The paradox is that the new acid is not at all aggressive towards materials.

The compound, called carboranoic acid, is the first "super acid" that can be stored in glass bottles. This softness of the new acid is due to its unusually high chemical stability.

Like all acids, the new substance interacts with other compounds, giving them a positively charged hydrogen ion. However, the remaining negatively charged anion is so stable that it does not react further. But it is this secondary reaction that is very significant in corrosion. For example, hydrofluoric acid attacks glass, which is mostly silica, by reacting its negatively charged fluorine ion with silicon and its hydrogen ion with oxygen.

The new acid - its formula H(CHB|1C111) - is an excellent hydrogen ion (proton) donor, which determines the "strength" of the acid. There are much more of these ions in its solution than in sulfuric or nitric acid. However, the carborane part of the acid, which remains after the departure of the hydrogen ion, contains a group of 11 carbon atoms that form the spatial structure of an icosahedron (twenty-sided).

Such a structure is the most stable of the groups of atoms existing in chemistry, which explains the corrosion inertness of the acid.

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