Calculate. Pressure

Calculate the pressure exerted on snow by the feet of a man with a mass of 81 kg if you know that the total surface area of the soles of his boots is 0,6 m2? Note: g = 9,8 m/s2. P = Pa

Choose. Upthrust and buoyancy

Choose the correct answer: What equals the upward thrust experienced by a submerged object in a liquid? What is the apparent weight of an object? What happens if the weight is less than the upward…

Think about it. Sound

Remember what you have studied in this section and answer the questions: Why do we say that sound transports energy? What kind of energy is it? If we put our ear close to a railway track, we know that a…

The great colonial empires

3.1. Dividing up the world The major European powers gained control of almost all of Africa and Asia, most of the islands in the Pacific Ocean and Oceania, and large parts of North America. Africa was…

Peasant revolts

We believe that peasants should not seek any other economic goal but the fairest distribution of land and farming equipment. Our hope lies with the Andalusian peasants, who we consider capable of…

El teatro de preguerra

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Coordinación rítmica

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La condición física y sus beneficios para la salud

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