How easy it is to take steps

Published May 01, 2018

How easy it is to take steps

Do you think taking steps is as easy as counting nuts? Try it, and you will see that getting to long names, you will not have time to mentally pronounce the numbers and start either to lose count, or involuntarily slow down the steps. How can you learn to easily take steps? This can be tried during a country walk, for example, on the highway, where, in addition...

How to determine the direction of the world?

Published January 20, 2019

How to determine the direction of the world?

On a sunny day, with a pocket watch, you can chart on the horizon with an accuracy sufficient for practical purposes, four directions of the world: north, south, east and west. This method is so simple and accessible that one should wonder why it has not yet found wide application...

How to calculate the horizon distance?

Published March 24, 2019

How to calculate the horizon distance?

What does it mean to calculate the horizon distance? This means finding out how far from the observer the horizon line is? In other words: how big is the radius of that circle, in the center of which we see ourselves on level ground? Let's answer this question. When we watch a ship merging from under the horizon from the seashore or a large lake...

How to calculate visual acuity?

Published June 09, 2019

How to calculate visual acuity?

Having mastered the concept of the angular size of an object, you can now understand how to calculate visual acuity, and even perform such a measurement. Draw on a sheet of paper twenty equal black lines with a length of a match (5 cm) and a millimeter of thickness, so that they fill the square. Having attached this drawing to a well-lit wall, move away from it until you notice...

The most profitable way to plant potatoes

Published November 17, 2019

The most profitable way to plant potatoes

Many of us have our own garden, or often go to the country, where they grow potatoes and other vegetables. In order to rationally use the area of the garden and get the maximum yield, you need to learn how to plant vegetables properly. For example, in order to get the maximum yield of potatoes, their planting should be done at some equal intervals, as prescribed by science...

The famous task of Thales

Published January 11, 2020

The famous task of Thales

Here, after the big problems, the resolution of which has been going on for centuries, we note a few more small, but very exciting in their simplicity questions that were once worthy of really great mathematicians, but now reduced to the level of almost childish problems. One of the most ancient tasks was the calculation of the height of the Egyptian pyramid by the length of its shadow made by Thales...

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