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Widely known for his contribution to the   creation ocurrent, multiphase systems and the motor will make a so-called second phase of the industrial revolution. also, it is known as a supporter of the existence of the ether: there are many of his experiences and experiments that had to show the existence of the ether as a special form of matter, amenable to the use of the technique.(этот абзац можешь удалить он второстепенный)f devicer that operate on alternatin 

винайдення телевізора

television, as you know is a complex technical process. its origins go back to the past. we can confidently say that a huge number of people involved in its development and improvement.thus, the tv wasn't invented by one person.the chain of events that led to the invention of television, started in 1817, when the swedish chemist jens berzelius opened chemical element selenium. it was later found that the amount of electric current, is selenium, depends on the amount of light that affect it. this property is called «фотоелектрикою».in 1875, this discovery helped american inventor, kerry make the first imperfect television system, for which he has used photovoltaic cells. the subject is focused through a lens unit pv cells in such a way that each element seems to «monitor» the amount of electricity flowing in incandescent lamp. dim outline of the object, which спроецьований for photovoltaic applications, then appeared on the surface of the filament lamp.the next step was the invention in 1884 floors ніпкоу «deployed image». this was achieved by means of a disk with openings that rotates in front of the photoelectric elements and different disc that rotates in front of the audience. but the principle was the same as that of kerry.in 1923 performed the first practical transfer of images by wire, and made it a bird in england and jenkins in the united states.then there was a huge leap in the development of television cameras. vladimir zworykin and phil farnsworth independently designed the camera, known as «інконоскоп» and «зображально-transmitting tube». until 1945 both transmitting tubes were replaced with newer.in modern tv is a so-called «a cathode ray tube». in this tube is the electron gun that scans an image of the screen just as the rays do it in ій a television camera, and as a result we see the image.of course, this does not explain to you, in detail, exactly how acts tv, but gives you an idea of how many different discoveries were to be realized by different people in different countries, to make possible the current tv.

1. last year nick was thirteen. how old is he now? 2. last january we went to scotland by train, we often go there by train.3. joan’s brother is going to visit paris soon.4. what wonderful weather we have) today! 5. jane always takes a train to glasgow.6. we decided to go to russia in june.7. bess did her room two hour ago. she always does her room on saturday.8. how often did you write letters to your granny last spring? 9. do you know where the london museum is? 10. boris sometimes has a lot of friends in his country house.11. little peter ran to his granny and she gave him an apple.12. polly ate a cucumber sandwich and drank some strong tea.13. yesterday at the bus-stop i met my friend aleck.14. i didn’t see fred at the party. was he there?

Ксожалению, учитель заболел и урок отменяется. этого учителя некем заменить надо сделать . мы сможем решить сложную по . это нужно выполнить к понедельнику. с калькулятора надо сосчитать результат. вы можете искать полезную информацию в интернете. я буду понятно объяснять одноклассникам ход решения. они станут вести запись моего выступления. unfortunately, the teacher fell ill and the lesson is canceled. this teacher's nobody to duplicate we must help children to do the job. we can help solve a complex problem in mathematics. it is necessary to carry out homework for monday. with the help of a calculator is necessary to calculate the result. you can search for useful information on the internet. i will clear the course to explain to classmates solutions. they will keep a record of my speech. unfortunately the teacher fell ill