Предмет: Физика, автор: emmikkennelly

1. Частота колебаний источника волн равна 300мГц, скорость распространения волны 54 км/ч. Чему равна длина волны?

2. Длина волны равна 15 м, скорость ее распространения 108 км/ч. Чему равна частота колебаний волн?

3. Найдите амплитуду, период, частоту колебаний и написать уравнение координаты тела, график которого изображен на рисунке 1.

Приложения:

Ответы

Автор ответа: Аноним
1

Объяснение:

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Приложения:
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Помогите пожалуйста! Заранее спасибо!
Вариант 1 и 2
1)Vocabulary practice. Translated the following phrases into English:
-натереть сыр на тёрке
-картофельное пюре
-щепотка перца
-прибавить в весе
-здоровая диета
-маринованные огурцы
-две чайные ложки сахара
-чистить картофель
-острый соус
-худеть
2)IDIOMS. Completed the sentences with the appropriate idiom using the words: milk, pinch, cake, tea, beans
-It's shame you lost your phone, but there's no use ...
- The test was very easy. It was ...
-Thanks for inviting me, but opera is not my ...
-She didn't want to ... and tell anyone my secret.
-Pete loves making up stories, so take everything he says with ...
-John loved this kind of films, it's his ...
-Please don't ... and tell my secret.
-The tes was easy, it was a ...
-She loves telling storing, so take what she says with ...
-I'm sorry that you lost the phone, but there's no use ...
3)PHRASAL VERB "GO". Complete the phrasal verb with the correct preposition:
-Don't use that milk. It's gone ...
-In the people went ... with bad illnesses (болезни)
-The dog went ... the cat
-The price of milk has gone ...
-How long can a man go ... water?
-The police officer went ... the robber
-This sausage I'd of strange smell. It's probably gone ...
-The prices for New Year's decorations has gone ... a lot.
-How long can an animal go ... food?
-She gone ... a lot since her accident
4)DEPENDENT PREPOSITIONS. Fill in the gaps with the correct preposition:
-I'll pay ... cash, thanks
-I'm afraid this is the ... last coat. We're ... of stock
-There shoes are ... great demand
-I'll pay ... credit card
-In this shop you can pay for things ... credit card
-On the Internet you usually can't pay ... cash
-This film is ... of stock
-It's ... great demand these days.
5)FILL in: •grated •meat •peel •punch •shoe
-I don't eat ... because I'm a vegetarian
-If you add a ... of salt, will taste better
-I need ... cheese for salad
-If you want to buy a pair of sandals for summer you should go to the ... shop
-Can you ... the potatoes, please?
-I hate ... cucumbers
-The rice was ... and the meat was tasteless
-Alan eats a ... of chocolate every day
-Don't forget to add a ... of salt to the salad
-I usually put two ... of cheese in my sandwich