Предмет: Физика, автор: Аноним

Тимур не любит пить крепкий горячий кофе, поэтому он всегда разбавляет кофе очень
холодной водой в отношении 2:1 (например, к 200 г кофе добавляет 100 г воды). Определите,
какой станет температура напитка после установления теплового равновесия между кофе
и долитой водой, если начальная температура воды о °С, а исходная температура горячего
кофе +75 °С. Удельные теплоёмкости воды и кофе одинаковые. Смешивание происходит
быстро, поэтому потерями теплоты можно пренебречь.

Ответы

Автор ответа: violettaveys2106

Температцра кофе будет составлять 45°С

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Read the text and answer the questions 1-8:
Dear Manager,
I started to work for your company as a guide about six months ago. I know that it’s my job to make sure that everything goes well for the tourists and I do what I can to make them feel safe and comfortable. But something quite unpleasant happened to me last weekend, though I don’t think I must be blamed for this.
Last Saturday I met a group of Spanish tourists at the airport and took them to the bus. The bus driver has been working for our company for about ten years. He is quite an experienced and patient person but this time he was a bit annoyed. The reason was that the flight was two hours late and the driver had to wait longer than usual. But it wasn’t far to the hotel and the tourists were looking forward to their
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I hadn’t used The Edelweiss hotel before and didn’t quite know what kind of service they had. When I announced our arrival at the reception desk, they said the hotel was full and didn’t have a single place for our group. Although I had booked rooms for the group beforehand, the manager said that somebody phoned a day before and said that we didn’t need the rooms any more. The manager insisted that he recognized my voice and that it was I who made the phone call and cancelled the order. We had a bit of an argument but obviously the real reason was that the hotel was full and couldn’t have more guests. In the end the manager phoned other hotels in the town and found rooms for my tourists, but in four different hotels. By this time the bus driver had gone so we had to get taxis and some of the tourists
started to get very angry with me. I still don’t know who made that phone call but it definitely wasn’t me. I hope you will understand the situation and won’t blame me for what happened that day. I’ve learnt a lot while working at your company and would like to continue doing the job.
Sincerely,
Sophia Blake.

1. Sophia is writing to the manager because she wants to …
a) Speak about her work experience;
b) Tell the manager how she is enjoying the job;
c) Say that The Edelweiss hotel had a bad service;
d) Say that what had happened was not her fault.
2. The bus driver was not happy because
a) The hotel was a long way to drive;
b) The flight was late;
c) The tourists were tired and hungry;
d) The guide treated him badly.
3. The Edelweiss hotel couldn’t receive the guests because
a) It didn’t have any free rooms;
b) They had a conference;
c) They didn’t like the guide;
d) It was too late.
4. Some of the tourists were angry because
a) The hotel was so far away;
b) The guide had left them;
c) The driver was not attentive;
d) They had to take taxis.
5. In the end who found the rooms for the tourists?
a) The guide herself;
b) The manager of The Edelweiss hotel;
c) The manager of The Sunshine hotel;
d) The driver.
6. What is the writer trying to do?
a) Argue;
b) Apologize;
c) Explain;
d) Complain.
7. The writer probably feels
a) Worried;
b) Happy;
c) Tired;
d) Busy.
8. Which of the following would be the best title for the text?
a) Sophia’s worst day;
b) Sophia’s mistake;
c) Not Sophia’s fault;
d) The best job for Sophia.
9. Выберите правильный вариант «My dad thinks I am not able of … my own living, but I am going … that he is wrong».
А) Earn; prove;
Б) Earning; proving;
В) Earn; to prove;
Г) Earning; to prove.
10. Выберите правильный вариант «I’ve made ... mistakes now than I made last time».
А) Few;
Б) A few;
В) Fewer;
Г) Less.
11. Выберите правильный вариант «The largest city of New England is Boston. The city is located in ___».
А) England ;
Б) Canada;
В) the United States;
Г) the United Kingdom.
12. Выберите правильный вариант «

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