на шелковой нити подвешен шарик 1, имеющий заряд то
на те
и массу 100 мг. под шариком 1, на расстоянии 30 см от него, за
крепили шарик 2, имеющий заряд +20 нкл. изобразите силы,
действующие на шарик 1. определите силу натяжения нити.​

1. Fred can play basketball. a)play b)plays c)to play 2. Fred plays basketball. a)play b)plays c)to play 3.Fred and Sam play basketball. a)play b)plays c)to play 4. Fred likes to play basketball. a)play b)plays c)to play 5. Does his friend play basketball? a)Is b) Does c)Do 6. Do his friends play basketball? a)Is b) Does c)Do 7. Mary readsEnglish books. a) read b)reads c)to read 8. Does Mary read English books? a) read b)reads c)to read 9. Are you a teacher? a)Are b)Is c)Can 10. Do you want to be a teacher? a)Are b)Do c)Have

We used to live in London years ago.

I didn't like London but I have already got used to living in London now.

Would you go cycling when you were five?

Tourists would not come here years ago.

I am used to hearing about the fantastic things he does. That's no suprise.

I have benn living in China for years. At first I didn't like the food but now i have already got used to eating their strange delicacies.

Years ago we used to see her a lot because she liven near us.

I am used to wearing glasses now but it took me a long time because i found it very uncomfortable.

When I was young, i used to visit my grandmother every summer.

While studying at the university, I used to go swimming twice a week.