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How is rap different? Detailed answer

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Directory / Big encyclopedia. Questions for quiz and self-education

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How is rap different?

Rap originated in 1980 as part of rock music. Most African-American musicians began to use fast recitative, recitation with a particularly hard rhythm. The texts reflect especially burning problems of modern society.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

Who was the first to announce that the earth revolves around the sun?

Aristarchus of Samos, born in 310 BC. e. - 1800 years before Nicolaus Copernicus.

Aristarchus was not only the first to state that the Earth revolves around the fixed Sun, he also calculated the relative sizes and distances between the Earth, the Sun and the Moon and determined that the sky is not a sphere, but the Universe is of practically infinite dimensions. However, his ideas remained without attention.

During his lifetime, Aristarchus was known more as a mathematician than an astronomer. We know little about him personally, except that he studied at the Alexandrian Lyceum and was subsequently mentioned by the Roman architect Vitruvius as a man "informed in all branches of science." Aristarchus also invented the semicircular sundial.

Only one of his works has survived to this day - "On the Sizes and Distances of the Sun and Moon". Unfortunately, Aristarchus' theory of the solar center is not mentioned in it. And we know about all this from a single remark in the texts of Aristotle, where the conclusions of Aristarchus are mentioned only in order to disagree with them.

Of course, Copernicus knew about Aristarchus of Samos, it is not for nothing that he repays his debt in the epoch-making work for its time, On the Revolutions of the Heavenly Spheres. However, when the book was printed in 1514, all references to the far-sighted Greek were carefully erased from the text - probably the publisher was simply afraid that they might undermine the book's claims to originality.

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Latest news of science and technology, new electronics:

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Modular Robots ElectroVoxel 28.02.2022

A group of scientists from the Computer Science and Artificial Intelligence Laboratory (CSAIL) at the Massachusetts Institute of Technology (MIT) and the University of Calgary have created a system of modular robots that can take on various forms. ElectroVoxel robots don't have motors or moving parts, they just use electromagnets to move around each other.

Each edge of these cube-shaped robots is an electromagnetic ferrite core wrapped in copper wire. Each side of the ElectroVoxel is about 60 millimeters long, and the total cost to build the robot is only 60 cents.

The shape of the robot changes when there is a change in the polarity of the magnet. Circuit boards and electronics inside each hub control the direction of current from each electromagnet.

To control the robots, a software scheduler is used to plan reconfigurations. The developers say that certain magnets can be isolated to control the speed of the cube and ensure that they do not collide with each other. Thousands of robots can be controlled at the same time and made to take any shape the user wants.

These robots can be used to modify and create structures in outer space, as well as to change the inertial properties of the spacecraft, which will help reduce the need for additional fuel for reconfiguration.

Robots can be used in space to build or replace structures, as well as to assist astronauts.

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