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Решаю задачи по физике, математике. Помогу с английским языком.
Всего эксперт дал 184 ответов, Рейтинг: +231 (45 лучших ответа, 8 голоса - За, 2 голоса - Против).
Ответ эксперта
Заряды будут располагаться в последовательности 4q -q q0. Расстояние между -q и q0 равно а=50 см
06.03.17
Ответ эксперта
при расчётах принять сопротивление конденсатора Zc=-j/(omega*C) omega=2*3,14*f- f частота
06.03.17
Ответ эксперта
нить накала представляет из себя нелинейное сопротивление, и зависит от степени нагрева, а  с ростом температуры сопротивление нити накала растёт
06.03.17
Ответ эксперта
Возникает э.д.с. самоиндукции, поле которой стремится скомпенсировать изменение основного.поля
06.03.17
Лучший ответ по мнению автора
Ответ эксперта
Agronomy is the science of the production of farm crops.
is-Present Simple

We do not know much of the origin of farm crop production.
do not know-Present Simple

Roman agriculture was the first of which we got some information from written documents.
was-Past Simple
got-Past Simple


Primitive man did not grow plants.
did not grow-Past Simple

He lived on leaves, roots, seeds, berries, and fruits.
lived-Past Simple

Crop production began when man started to cultivate plants.
began-Past Simple
started to cultivate-Past Simple+Infinitive

The early farmer cultivated a limited number of crops, but he grew some grain crops which the farmer grows at present.
cultivated-Past Simple
grew-Past Simple
grows-Present Simple

All important farm crops originated from wild species.
originated-Past Simple

Science helped, helps and will help to increase yields of crops.
helped-Past Simple
helps-Present Simple
will help to increase-Future Simple+ Infinitive

Findings in field and laboratory research are leading to new recommendations.
are leading- Present Continuous

The farmer who follows the most efficient practices will get higher yields.
follows-Present Simple
will get-Future Simple

The plant grower who 11 still farms as his father did when he was a boy is the farmer who does not and will not get high yields of crops.
did-Past Simple
was-Past Simple
is-Present Simple
does not (get)-Present Simple
will not get-Future Simple
06.03.17
Ответ эксперта
Agronomy is the science of the production of farm crops.
is-Present Simple

We do not know much of the origin of farm crop production.
do not know-Present Simple

Roman agriculture was the first of which we got some information from written documents.
was-Past Simple
got-Past Simple


Primitive man did not grow plants.
did not grow-Past Simple

He lived on leaves, roots, seeds, berries, and fruits.
lived-Past Simple

Crop production began when man started to cultivate plants.
began-Past Simple
started to cultivate-Past Simple+Infinitive

The early farmer cultivated a limited number of crops, but he grew some grain crops which the farmer grows at present.
cultivated-Past Simple
grew-Past Simple
grows-Present Simple

All important farm crops originated from wild species.
originated-Past Simple

Science helped, helps and will help to increase yields of crops.
helped-Past Simple
helps-Present Simple
will help to increase-Future Simple+ Infinitive

Findings in field and laboratory research are leading to new recommendations.
are leading- Present Continuous

The farmer who follows the most efficient practices will get higher yields.
follows-Present Simple
will get-Future Simple

The plant grower who 11 still farms as his father did when he was a boy is the farmer who does not and will not get high yields of crops.
did-Past Simple
was-Past Simple
is-Present Simple
does not (get)-Present Simple
will not get-Future Simple
06.03.17
Лучший ответ по мнению автора
Ответ эксперта
Agronomy is the science of the production of farm crops.
is-Present Simple

We do not know much of the origin of farm crop production.
do not know-Present Simple

Roman agriculture was the first of which we got some information from written documents.
was-Past Simple
got-Past Simple


Primitive man did not grow plants.
did not grow-Past Simple

He lived on leaves, roots, seeds, berries, and fruits.
lived-Past Simple

Crop production began when man started to cultivate plants.
began-Past Simple
started to cultivate-Past Simple+Infinitive

The early farmer cultivated a limited number of crops, but he grew some grain crops which the farmer grows at present.
cultivated-Past Simple
grew-Past Simple
grows-Present Simple

All important farm crops originated from wild species.
originated-Past Simple

Science helped, helps and will help to increase yields of crops.
helped-Past Simple
helps-Present Simple
will help to increase-Future Simple+ Infinitive

Findings in field and laboratory research are leading to new recommendations.
are leading- Present Continuous

The farmer who follows the most efficient practices will get higher yields.
follows-Present Simple
will get-Future Simple

The plant grower who 11 still farms as his father did when he was a boy is the farmer who does not and will not get high yields of crops.
did-Past Simple
was-Past Simple
is-Present Simple
does not (get)-Present Simple
will not get-Future Simple
06.03.17
Лучший ответ по мнению автора
Ответ эксперта
Primitive man did not grow plants.
did not grow-Past Simple

He lived on leaves, roots, seeds, berries, and fruits.
lived-Past Simple

Crop production began when man started to cultivate plants.
began-Past Simple
started to cultivate-Past Simple+Infinitive

The early farmer cultivated a limited number of crops, but he grew some grain crops which the farmer grows at present.
cultivated-Past Simple
grew-Past Simple
grows-Present Simple

All important farm crops originated from wild species.
originated-Past Simple

Science helped, helps and will help to increase yields of crops.
helped-Past Simple
helps-Present Simple
will help to increase-Future Simple+ Infinitive

Findings in field and laboratory research are leading to new recommendations.
are leading- Present Continuous

The farmer who follows the most efficient practices will get higher yields.
follows-Present Simple
will get-Future Simple

The plant grower who 11 still farms as his father did when he was a boy is the farmer who does not and will not get high yields of crops.
did-Past Simple
was-Past Simple
is-Present Simple
does not (get)-Present Simple
will not get-Future Simple
06.03.17
Лучший ответ по мнению автора
Ответ эксперта
1. Climatic conditions influence the growth of plants. (to influence)
Present Simple
Климатические условия влияют на рост растений.

2. The ideas of V.V. Dockuchayev influenced greatly the development of crop science. (to influence)Past Simple
Идеи Докучаева значительно повлияли  на развитие науки о зерновых.


3. The students are planting trees in the park now. (to plant)
Present Continuous
Сейчас студенты сажают деревья в парке.

4. They will discuss some new problems at their physics lesson tomorrow. (to discuss) Future Simple
 Завтра они будут обсуждать некоторые новые вопросы на лекции по физике.

5. What was he doing when you visited him yesterday? (to visit)
Past Simple
Чем он был занят, когда ты заходил к нему вчера?


6. The new fertilizer increases the amount of useful elements in the soil. (to increase) Present Simple
Это новое удобрение увеличивает количество полезных элементов в почве.


7. The climate  changed greatly in the central regions of our country. (to change) Past Simple.
The climate has changed greatly in the central regions of our country.
Present Perfect
В центральных регионах нашей страны климат значительно изменился.
04.03.17
Лучший ответ по мнению автора
Ответ эксперта
1) Мы смотрели фильм уже час, когда пришел Боб и выключил телевизор.
 We had already been  watching the movie for an hour when Bob came and turned off the TV.

2) Он сказал, что не хочет читать книгу.
He said he didn't want to read this book.
 
3) Завтра к 3 часам я уже сдам экзамен и мы сможем пойти погулять.
I shall(will) already have passed the examenation by three o'clock tomorrow and we shall(will) be able to go for a walk.

4) Вчера, когда я пришел домой, я обнаружил, что Том съел мой ужин и ушел.
Yesterday when I came home I found out that Tom had eaten my supper and gone away.

5) Я уже сказал Бобу, что завтра мы не встретимся.
I've already said to Bob that we are going to meet (we will meet) tomorrow.

6) Мы гуляли в парке, когда начался дождь.
We were strolling in the park when the rain began.

7) Если ты придешь вовремя, я отвечу на все твои вопросы.
If you come in time I shall(will) answer all your questions.

8) Я устал, потому что сделал сегодня много вещей.
 I'm tired because I've done many things today.

9) К тому времени как ты прочтешь это письмо, я уже поговорю с Джоном.
By the time you read  this letter I will already have talked with John.
 

10) В следующий раз, когда ты меня спросишь, я тебе не отвечу.
The next time when you ask me, I shall(will) answer you.
04.03.17
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