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Вопрос № 1072614 - Английский язык

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The discovery of X-rays in 1895 by the Prussian physicist Wilhelm Rontgen saw the beginning of a new age of physics. Thinking that the rays were unrelated to light and being uncertain of their nature, he called them X-rays. Rontgen discovered that when X-rays were directed through the body of a living person, the bones cast shadows on a photographic plate placed behind the body. X-rays are now also used in concentrated doses to treat cancer. Rontgen was the first person to be awarded the Nobel Prize for physics, which he received in 1901. The name Rontgen is now given to a unit of radiation, either X-rays or gamma rays.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 18:15
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 18:15

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Вопрос № 1072613

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Rays of light like all forms of energy that travel in waves can be reflected. Light rays are reflected. Light rays are reflected when they hit a shiny or silvered surface, such as a still pool of water or a mirror. Reflection involves two light rays and the reflected, or outgoing, ray, which bounces off the reflecting surface. The two rays are at identical angles to the reflecting surface on either side of an imaginary line.
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Вопрос № 1072227

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Radioactive substances are composed of unstable atoms that break down and release high-level energy called radiation. These atoms eventually form new elements. There are three types of radiation, known as alpha rays, beta rays, and gamma rays. Alpha rays consist of four atomic particles: two protons and two neutrons. They are the weakest type of radiation and have a positive electrical charge. Beta rays are more powerful and are composed of atomic particles called electrons, which have a negative charge. Gamma rays are the most powerful and a pure form of energy with no mass and no charge.
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Alpha rays consist of …
gamma rays
beta rays
electrons
protons and neutrons

Другие вопросы по предмету Английский язык

Вопрос № 1072615

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Rene Descartes was a French philosopher and mathematician. 1_______. He wrote some works in Latin. 2_______. He lived and worked in many different European countries. Descartes developed the science of geometry into the discipline that most schoolchildren know today. 3_______. He is generally accepted to be the father of modern Western philosophy. 4_______.
He is also known by his Latin name, Renatius Cartesius
But he broke with philosophical tradition by writing in his native language as well
He also invented the system of powers and created symbols for graphs – the Cartesian coordinate system
All of us know his famous phrase “Cogito ergo sum” (“I think therefore I am”)

Вопрос № 1072616

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Mathematics has a language of its own. 1_______. The earliest recorded numbers were marks made on a stick. 2_______. Eventually these groups were given symbols of their own and a system of arithmetic developed. 3_______. They also introduced special words to express new ideas. 4_______.
It uses numbers and symbols instead of words and punctuation
These marks were made in small groups
Mathematicians introduced special symbols to replace words such as “plus” and “equals”
Terms such as “triangle” and “square”, for example, were applied to figures that are geometrically defined

Вопрос № 1072617

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The Greek mathematician Euclid worked in Alexandria, Egypt, 2300 years ago. 1_______. But he is famous for writing Elements, a series of 13 books. 2_______.In fact, these books were so clearly written that updated versions were still in use in schools in the early 1900s. 3_______. Mathematician and physicist Albert Einstein later proved that Euclid’s geometry was not valid throughout space and time. 4_______.
Few details of his life remain
They contained geometric principles and theorems that were to form the basis of mathematics for more than 2000 years
Some of the Euclid’s theorems still hold good today
Euclid also wrote on music and other subjects

Вопрос № 1072618

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Electricity and magnetism combine to form one of the fundamental forces of the universe – electromagnetism. The two constantly interact, and the relationship between them is one of the most important in physics. For example, an electric current passing through a wire creates a magnetic field; and if the lines of force around a magnet are cut by passing object, an electric current will be produced.
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Electricity and magnetism combine to form one of the fundamental forces of the universe – …
an electric current
a magnetic field
the relationship
electromagnetism
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