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Imagine that an oar boat is sailing along the lake, and let, for example, arrow a represent the direction and speed of its movement. A sailboat is passing by; Arrow b shows its direction and speed. If you are asked where the boat sailed, you, of course, immediately point at right angles to the rowing boat point M on the shore. But if you ask the passengers of a rowboat...

Who does not know the great Italian scientist of the Renaissance, by the name of Galileo? The development of mechanics in the pre-Newtonian era as a science is associated with his name. The greatest merit of Galileo as a scientist-mechanic was that he was the first to lay the foundations of scientific dynamics, which dealt a crushing blow to the dynamics...

The emergence of fundamentally new facts, inexplicable within the framework of the existing theory, leads to the development of a more general theory that "absorbs" and previous concepts. If, in the process of cognition, it turns out that some group of regularities can be deduced from regularities more general, this does not at all mean that the former...

Shortly before his death, the famous American inventor Edison wished to distinguish the most sensible young man in his country, appointing him generous financial support for further education. From all parts of the republic young people were sent to him, one from each state, selected by the school authorities. These fifty young men were subjected to a written examination in Edison's house...

Descartes, a great thinker of the 17th century, regarded man as a machine. A modern scientist would be more inclined to call our organism rather a factory than just a machine. Man is a "plant", which has its own special "technique". In this plant there is a division of labor, - different organs perform a very definite function, - and their own control system with the help of nerves...

In 1929 in one of the London theaters there was a rehearsal of the play, the time of action in which, in the course of the play, was to be transferred from our days to 1763. The director wanted very much that during the darkening on stage the audience prepared for almost a one and a half-century jump in action, but how to do it, the director could not think of...