NO JERUHRT
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4 Лексика П
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clever, loud, shy, strong, scared, tired
1. My brother is the best student in the class. He is very
2. My father works 12 hours a day and often comes home very
3. He never goes to the parties and often stays home because he is quiet
4. This man has to carry big bags, fix cars and bikes. That's why he is very
62
5. He often plays
music and has problems with his neighbours.
6. She was alone in the dark wood and really
No5 Грамматика
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ответ:
объяснение:
1. the practical significance of customs law is determined by the fact that as the development of international relations, the increase in the volume of trade between our country and the countries of the world community, an increasing number of citizens depend on the state of the customs system and the legality of customs activity.
2. in the modern view, the term “customs” covers a complex set of relations directly related to foreign and domestic policies and the activities of the state. within the framework of state policy, customs business serves the satisfaction of diverse interests and needs.
3. the main purpose of the customs policy of any state is to ensure its economic interests.
4. the customs system of russia has the richest experience in protecting the economic sovereignty and security of the state, the domestic market, domestic trade and industry.
Never miss an opportunity to observe a bright comet. During the year in a small Amateur telescope you can see only a few of them. Most comets, which periodically appear in the vicinity of the Sun, are quite weak objects. The exception is Halley's comet, which, with each return to the Sun (76 years later), appears to us as a very bright and impressive object. In fact, the brightest and most spectacular-looking comets appear in the sky unexpectedly; many of them, perhaps for the first time, are approaching the Sun. Those few weeks, during which time a comet goes around the Sun quickly, and then disappearing forever or perhaps for many millennia in the cosmic expanses, is the hottest time for astronomers komedchikov. In rare cases, especially if a comet approaches too close to the Sun, it can collapse into parts that are later observed as separate bodies.
Comets
The structure of the comet. The gas tail is always directed away from the Sun, the dust tail remains with the comet in orbit.
Comets look different. All observed misty gas shell-coma, which together with the nucleus forms the head of the comet. Even if the comet is in close proximity to the Sun, its head seems to be no more than a foggy spot. The most remarkable detail of most comets is the tail. It is most striking when the comet is in the vicinity of the perihelion of its orbit. Here, the heat flow from the Sun is particularly significant, under the influence of which gases and dust escape from the comet into space. Some comets have two tails: one is curved, consisting of dust particles; the other is straight, gas, stretched in the direction exactly opposite to the direction of the Sun. A number of comets had several (dusty) tails. The length of comet's tails can reach tens and hundreds of millions of kilometers; comets were observed, the tails of which stretched almost to half the sky. It is assumed that the dust lost by comets, falling into interplanetary space, gives rise to meteor bodies, which later, colliding at high speed with the earth's atmosphere, are found in the form of meteors. Dust from comet tails also join the interplanetary dust cloud that is scattering the sun's rays, gives rise to the phenomenon called the zodiacal light.
The nucleus of a comet is sometimes visible inside a coma in the form of a bright star-shaped object in which it is not possible to distinguish any details even in the largest telescopes. Sometimes the nucleus can be confused with different structural formations in a coma-type shell or ejections of matter from the nucleus of a comet.
The observation of comets
Any tools can be used to observe comets. Experience has shown that giant comet tails can be detected by naked eye observation, through binoculars and telescopes with a wide field of view. But to see the complex structure of a comet near its nucleus, telescopes with large apertures and large magnification are needed. Sketches of comets can be done when observing in any tools, their technique is the same as when sketching planets. Along with the sketches is to try to photograph the comet. Photos help not only to determine the exact position of the head of the comet, but also to get an image of its tail, as well as to see subtle details that due to their low brightness can not be seen in other ways. For the observation of comets requires light-aperture lenses with a wide field of view, for photographing the fine details of the coma is better to use telescopes or long-focus cameras. When photographing comets, the telescope (or camera) must be equipped with a guide system that would monitor the comet in view of its own motion among the stars; in this case, the images of stars in the pictures will be in the form of dashes. When using short-focus lenses, you can guide directly through the stars.
Many experienced Amateur astronomers attempt to detect comets. Such observations require a great deal of patience, a good knowledge of the sky, especially the location on the sky of clusters of stars and galaxies, sometimes very similar in appearance to the comet. Such observations use large binoculars with a wide field of view or short-focus telescopes; comets are usually searched in the vicinity of the Sun, where they can get, while remaining invisible when moving in an elongated orbit.