определите полезную работу, совершенную двигателем трактора, если для ее совершения потребовалось 1,5 кг топлива с удельной теплотой сгорания 4,2*10 6 дж/кг, а кпд двигателя 30%

Помогите пожалуйста!!!-Охарактеризуйте роль подземных вод в природе и хозяйстве!

В нашей компании 5 человек. У нас есть некоторое количество денег,в среднем по 80 рублей на человека. У меня 100 рублей. Сколько в среднем денег у остальных 4 членов компании?

опишите пожалуйста подробно решение)

1. Put the verbs in brackets into correct tense. Choose the correct option.

1.… (you/see) the new talk show last night?

a. Have you seen

b. Did you see

2. I … (always/want) to appear on TV.

a. have always wanted

b. always wanted

3.When I came home, my favourite programme … (finish) and a quiz show was on.

a. has finished

b. had finished

4. How long … (go out) with your girlfriend?

a. have you been going out

b. do you go out

5. I … (know) him for ages.

a. has known

b. have known

6. When I phoned, they … (have) an argument.

a. were having

b. are having

2. Put the questions into indirect speech. Begin: “The reporter asked her… .”

1. Are you married?

The reporter asked …

2. How long have you been married?

The reporter asked …

3. How did you meet?

The reporter asked …

4. Where are you going to spend your holiday?

The reporter asked …

3. Choose the best option for the following sentences:

1. Wherever he goes, he … lots of friends.

a. finds

b. makes

2. They always … over the money.

a. quarrel

b. row

3. He has … in love with her for three years already.

a. been

b. fallen

4. It was love at first … .

a. look

b. sight

5. They … after seven years of marriage.

a. split up

b. broke off

6. Isn’t this guy a friend of .. ?

a. your

b. yours