What is Sisyphean labor? Detailed answer

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What is Sisyphean labor? Detailed answer

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What is Sisyphean labor?

According to Greek mythology, Sisyphus is a man who deceived the gods and death itself. For this, Zeus sentenced him to always drag a stone up the mountain, which then rolled down. This senseless work is called Sisyphean labor.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What is the difference between edible mushrooms and grebes?

The answer is that there is no difference between them! Scientifically speaking, there is no such thing as "toadstool". Many people call poisonous mushrooms grebes. Botanists do not use this term at all, and for them there is no difference between an edible mushroom and what we call grebes.

There are many ideas about mushrooms, but they are completely wrong. There are very few types of mushrooms that are poisonous. But they are really deadly. Therefore, no one should eat or even taste mushrooms until he is sure that they are not poisonous. But people do not always correctly determine the toxicity of mushrooms. For example, it is not true that all umbrella-shaped mushrooms are poisonous.

It is also not true that mushrooms are poisonous if, when they are boiled, a silver spoon darkens with which they are interfered with. Poisonous mushrooms contain such a strong poison that eating them means certain death. There is a story that Emperor Nero once poisoned a whole group of guests by treating them to poisonous mushrooms. The best way to avoid this is to eat store-bought mushrooms.

Mushrooms are in the same family as molds. Like all plants belonging to this group, they lack the green substance, chlorophyll, without which the plant cannot produce food for itself. They grow next to some other plant that has chlorophyll and are completely dependent on it. Mushrooms are very delicate plants. They are made up mostly of water, so most of them can't stand dry winds or the hot summer sun.

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Random news from the Archive

Lead is stronger than steel 02.12.2019

Under normal conditions, lead is relatively soft, easily scratched with a fingernail. But when compressed at extreme pressures, it becomes hard and strong - even stronger than steel.

To study how the strength of lead changed under pressure, the researchers quickly compressed a sample of lead by blasting it with lasers at the National Ignition Facility at Livermore National Laboratory. Lawrence in California. The pressure in the sample reached about 400 gigapascals - similar to the pressure in the Earth's core.

The strength of a material characterizes its response to stress - the force applied to a given area. The greater the stress that a substance can withstand before it is deformed, the stronger it is. Physicist Andrew Crigier of Lawrence Livermore and his colleagues observed how pulsations in lead grew and deformed under high pressure. Growth was relatively slow, indicating that the metal was 250 times stronger than lead under normal conditions and about 10 times stronger than high-strength steel.

When materials are compressed, their properties can change dramatically. For example, hydrogen - usually a gas - can turn into a metal. Understanding how substances change in response to pressure can be important to improve the design of protective equipment such as bulletproof vests.

Calculations show that pressure changes the crystal structure of lead, causing a rearrangement of its atomic lattice. The researchers concluded that this structural change results in a stronger metal.

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