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The shadow of the train

On a sunny morning a high-speed train from the RENFE company departed from the Zaragoza station bound for Barcelona. Who will travel faster, the train or its shadow? Solution In principle, the speed of the train is the same as that of its shadow, but if we take into account that the shadow of a static object moves from west to east we must assume that the shadow of the train will travel more slowly when the train moves towards the West but faster when the train travels east.
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Articles

Sullivan's object relations theory

Sullivan laid the groundwork for understanding man based on the interpersonal relationships in which he develops. In its postulates, the elements under study that are, in turn, subject to treatment, are produced by culture. Sullivan focuses on object relations rather than intrapsychic conflict.
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Expectations and disappointment

How do you feel when things don't happen as you expected? Do you usually expect a lot from others? In mythology, Pygmalion was determined not to fall in love with someone who was not perfect, by modeling a marble statue with a female figure that he considered ideal, he fell in love with her, Aphrodite made her fervent wish come true ... This is a beautiful myth, however in reality, perfection among human beings does not exist, the expectations of this class can "sculpt" false illusions or hopes.
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The puzzleland school

Here is the quilt made of scraps that the school children presented to their teacher in puzzlelandia. You will find in it the names of all the boys in the class hidden among the letters. To do this, start in any box joining the letters found in adjacent boxes. For example, from the letter J we can get James as shown, but how many school children do you think there are in total?
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The square

If a square measuring 1 meter side is divided into squares of 1 decimeter side, how long would these squares be if we put them in a straight line? Solution It would have 10 meters. The number of squares that would fit inside is 100, since a square decimeter (symbol: dm²) is a unit of surface that occupies a square of a decimeter of side.
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