2. Масло объемом 0,2 мм растеклось по поверхности воды тонким слоем и заняло площадь 0,8 м. Принимая толщину слоя равной
диаметру молекулы масла, определите этот диаметр​

Dear Mum and Dad, I am all right. I like the camp very much. It is near a beautiful river in a green forest. It has a volleyball ground and a sports ground. We look after the gardens and water the flowers. In the centre of our camp there is a square. This is the place for camp meetings.
We get up at 7 o’clock and do morning exercises. After that we wash and make our beds. After breakfast some go to the forest, others help to pick vegetables.
After dinner we must sleep, but it’s difficult to sleep in the day-time. When the girls begin to speak, the door of our room opens and we hear, “Who isn’t sleeping?” There is no answer, we are all “sleeping”.
After two hours of rest we have a glass of coffee or milk and eat bread or a cake. Then we read or draw, play table games, volleyball or basketball. In bad weather we can read books, write letters, prepare dances and songs for evening parties and do other things. We dance, play games or watch films after supper. Then we go to bed.
Please write if you are coming on Sunday. Bring Borya too. Does he go to the children’s summer playground?
Well, my letter is too long today, but I have very much to tell you.
Love, Lena

Переведем с английского:

Письмо из лагеря
Дорогие мама и папа, у меня все в порядке. Мне очень нравится лагерь. Он возле красивой речки в зеленом лесу. В нем есть волейбольная и спортивная площадки. Мы ухаживаем за садом и поливаем цветы. В центре нашего лагеря есть площадь. Это место для собраний в лагере.
Мы встаем в 7 часов и делаем утреннюю зарядку. После этого мы моемся и застилаем постели. После завтрака некоторые идут в лес, другие же собирать овощи.
После обеда мы должны спать, но это сложно, спать в дневное время. Когда девочки начинают разговаривать, дверь нашей комнаты открывается и мы слышим "Кто не спит?" ответа нет, мы все "спим".
После двух часов отдыха мы получаем стакан кофе или молока и едим хлеб или пирожное. Потом мы читаем или рисуем, играем в настольные игры, волейбол или баскетбол. В плохую погоду мы можем читать книги, писать письма, готовить танцы и песни для вечеринок и заниматься другими вещами. Мы танцуем, играем в игры или смотрим фильмы после ужина. Потом мы идем спать.
напишите, если вы приезжаете в воскресенье. Возьмите Борю тоже. Он ходит на летнюю детскую площадку?
Ну, мое письмо очень длинное сегодня, но у меня есть очень много чего сказать вам.
Целую, Лина.

Прям райский курорт, а не пионерский лагерь. И почему это все не нравилось во время существования данных лагерей...

The film tells about the formation of the Soviet hockey player Valery Kharlamov.The film opens with a vivid memory of 1956 on children's experiences during the race bulls in Spain, where my mother was born Kharlamov. Then the action is transferred to Moscow in 1967, where a young hockey player acquainted with the famous coach Anatoly Tarasov, who sends Valeria, along with his friend Alexander Gusev in the city of Chebarkul Chelyabinsk region, where they will play for the local "Stars". Overcoming the difficulties in adapting a minor league team, Valery shows hockey and score at the end of the season he returned to Moscow, where Tarasov invites him to join CSKA(ЦСКА) Moscow, but at first check the nature of Kharlamov and his ability to completely give up their lives to hockey. After the scandalous match between the USSR and the "Spartacus" when Tarasov in protest against the refereeing team has withdrawn from the ice, frustrated Kharlamov gets into an accident and seriously injures a leg (in the film, this episode biography of hockey repositioned by 4 years ago). After surgery, Valery began to develop the leg, so that a return to the ice as soon as possible, since in 1972 appointed the first-ever series of meetings with the team of the USSR Canadian professionals. Overcoming the pain, Kharlamov begins to train, and new coach Vsevolod Bobrov appointed instead Tarasova includes Valeria in the squad leaves for the game in Canada. Tarasov came to hold the team at the airport and said parting words Kharlamov.Soviet hockey players arrive in Montreal. Canadians are confident in the victory of their team and are trying to prove that the Soviet Union: at the press conference Canadian journalist says that in case of victory of the Soviet team will eat the evening edition of the newspaper, and on TV shows the two leaders of the Canadian national team, Phil Esposito and Bobby Clarke hinted that the Soviet team no chance of winning. Finally, before the actual match Bobrov under the door of the hotel put the paper with a caricature, where the Soviet hockey players in the form of a "snotty" students learn to play hockey in Canada, "the teacher." Starting the match. Canadians win the face-off and after half a minute, opened the scoring. In the sixth minute the score 2: 0. But soon the USSR national team compares the account, and in the second period Kharlamov displays team ahead 2: 3. His second goal Valeri scored, clocked several opponents, after that goal all the audience applauded standing Kharlamov. During the break, the Canadians coach says his players that this is not a match, and the war, and with it the "number seventeenth" we need to understand. During the game, Bobby Clarke swung beats Kharlamov stick on the back of the knee sore feet. However, the latter refused to leave the game, despite the threat of becoming disabled, and returns to the ice. At the end of the match, Valery, sweeping the puck to the goal of Canadians, falls from the pain, but, falling, makes an assist, after which flies seventh goal against the Canadians. After the match, Phil Esposito says Kharlamov that impressed by his performance, speed and two goals.Episodic shows almost telepathic communication between the coach Tarasov experiencing events in the game, while in the autumn Moscow, and the players on the stadium arena. Parallel Kharlamov seems bullfights.USSR national team scored a few more goals, with the active participation of Kharlamov and wins with a crushing score of 7: 3