Предмет: Физика, автор: nikita1643d

помогите пожалуйста с задачей

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Автор ответа: v1248
0
№1
А. Объем газа –Уменьшается P·V=(m/µ)·R·T Так как Т между начальным и конечным состоянием уменьшилась при неизменном давлении Р
Б. Концентрация молекул – Увеличивается (удары молекул о стенки сосуда обеспечивают давление такое же но при меньшей температуре)
В. Кинетическая энергия движения – уменьшается из-за уменьшения температуры. E=(3/2)·k·T  

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1. Complete the letter by putting the verbs in brackets into the present perfect or the present perfect continuous.

Dear Jimmy,

How are you? I’m sorry I 1) (not be) in touch lately, but I 2) (study) hard for my exams. Well, let me tell you my news! To start with, I 3) (have) a really nice haircut and I look so different now! I 4) (also/sign up) for a taekwondo class! We 5) (not start) yet, but we’ll start in a week. My friend, Billy, 6) (take) the same class for two weeks now. I think you 7) (meet) him before. He was at the college concert last week. Billy says that it’s great exercise and a lot of fun. He 8) (not/have) many lessons yet, but he 9) (already/learnt) some basic moves. I'm so anxious to start next week. I think it’ll be great! Well, that’s my news! Let me know what you 10) (do) with yourself lately. Is it true that you’re moving to Paris? 11) (you/find) a house yet?

Write back soon.

Bob



2. Fill in the gaps with a/an or the where necessary.

There’s 1) … expression in 2) … English language that perfectly describes someone who is very careful about how he’ll spend 3) … small amount of money but isn't careful at all with large amounts. 4) … expression is "penny-wise and pound-foolish". Are you 5) … type of person who manages 6)… money in 7) … similar way? My friend Jim is. Last year we went to 8) … London on 9) … holiday and he didn't want to buy 10) … souvenirs from 11) … Gatwick Airport because he thought they were too expensive. However, he was more than happy to spend £115 12) … hour to go down 13) … River Thames on 14) … private boat!