Вопрос школьника по предмету Физика
На непрозрачный экран с щелью шириной 10 мкм падает параллельный пучок монохроматического света. Угол отклонения второго дифракционного максимума 7°10′. Определить длину волны падающего света.
Ответ учителя по предмету Физика
Ответ:
Опять
Объяснение:
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Сравни:
1/8 суток 180 мин
1/3 суток 2 ч
1/2 км 50 дм
1/4 от 2 т 80 ц
1/4 от 2 суток 36 ч
1/5 от 6 м 12 дм
1/2 суток 14 ч
1/4 от 1 км 500 м
1/4 м 25 см
1.Would you like some sparkling water? – No, I prefer still/fizzy.
2.Oily/Bitter chocolate is my weakness, but it’s unhealthy to it.
3.Nowadays there are a lot of kinds of additives/spices. They can be either natural or artificial.
4.Buying food is the only thing you can do for the greeding/starving and poor people.
5.I prefer to avoid using artificial/fake additives, they can consist monosodium glutamate.
6.To buy these pills you should get a recipe/prescription from your doctor.
7.Do you smell that something is sour/rotten? I think that it has got out of order.
8.Do you know the effectual remedy to cure/treat a slight cold?
9.When I broke my leg, I found the pain/ache unbearable.
Task 2. Fill in the gaps with the appropriate word.
Eyesight, infections, complain, grilled, rumbling, sprinkle
1.We make our own troubles and then we start to _______ of them.
2.Bilberry and carrots are good for your _________.
3.Taking different vitamins will help you to avoid flu and other infections.
4.If you find the soup undersalt, just sprinkle some.
5.______ food is healthier than fried.
6.I’m really hungry – my tummy is _______.
Task 3. Put the verbs in brackets into the correct form.
1.If Mark ______(be) younger, he could join the army.
2.If you had locked the door, the burglars _______(not/get) in.
3.If you like Tom Cruise, you ______(love) this film.
4.If I were you, I _____(not/go) out in this weather.
5.Emily would have called me if she ______(change) her mind.
6.Unless you _______(go) to bed now, you ______(be) tired in the morning.
7.I wish I _______(practice) harder before the concert.
8.If only we _______(go) to France last summer.
9.If Steve ______(call), tell him I’ll be back in ten minutes.
Task 4. Fill in the appropriate preposition.
1.Have you given _______the computer that you take from the library?
2.Ryan has given ______on diets. He says they´re no good for anyone.
3.Many flowers give _____ an aroma that attract us and we use it to decorate our rooms.
4.New York Restoration Project will give ______hundreds of free trees to New Yorkers.
5.My uncle gave _______smoking after his father died of lung cancer.
6.I advise you _______ going on a crash diet.
7.The lack of physical training can result _______ health problems in future.
СЛОВА ДЛЯ СПРАВОК: уйти в себя, вывести из себя, овладеть собой, взять себя в руки, быть самим собой, вне себя, работать над собой, себе на уме, строить из себя, не по себе.
1. Бабушка плохо себя чувствует, ей …
2. Дедушка очень рассердился, был …
3. Он очень расстроился, но потом …
4. Надо … в любой ситуации.
5. «Он …»- так говорят про хитрых людей.
6. Чтобы быть воспитанным, надо много …
7. Он ничего не замечал вокруг, …
8. Всегда надо стараться …
9. Она … неизвестно что.