для запуска планера применяют резиновый канат.Определите силу, с которой планер действует на канат,в тот момент,когда две половины каната составляют между собой угол 90 градусов,а каждая из них растянута силой 500 Н.

Задача:с лодки, движущейся со скоростью 2м/с, человек бросает весло массой 5 кг с горизонтальной скоростью 8м/с противоположно движению лодки. С какой скоростью стала двигаться лодка после броска, если ее масса вместе с массой человека равна 200 кг?

как записать краткое условие и решение к данной задаче:

В двух корзинах было 20 груш. Когда из первой корзины взяли 4 груши, то в обеих корзинах груш стало поровну. Сколько груш было в каждой корзине сначала?

Помогите пожалуйста решить!!! 1. He hasn^t got so ___money. a)a few,b)many,c)much,d)a little. 2. ___ do you see in the park ?a)Which,b)Whom,c)Why,d)Whose. 3. ___ book is it? a)Whose,b)Why,c)When,d)How. 4. ___ do you usually have for breakfast?a)Which,b)How often,c)What,d)Where. 5. ___ do you have meals? - As a rule,three times a day. a)How,b)How far,c)How often,d)When. 6. ___ them your dictionary,they left theirs at home. a)Take,b)Lend,c)Translate,d)Buy. 7. Are you going to tell ___ the truth? a)my,b)his,c)they,d)us. 8. I can see___and___brother.a)their,Mary,b)him,Mary^s,c)us,Maries^,d)your,Mary^s. 9. A lot of people ___ in English. a)interested,b)are interesting,c)have interested,d)are interested. 10. I would like to talk ___ the phone___him.a)in,to,b)on,to,c)at,with,d)for,without. 11. He speaks English ___better than French.a)more,b)much,c)many,d)most. 12. You enjoy the film,___? a)do you,b)don^t you,c)aren^t you,d)don^t you. 13. He is going to look ___his father until he is well again.a)for,b)after,c)up,d)through. 14. Mark Twain^s words: "When in doubt___the truth.a)tell,b)say,c)talk,d)speak. 15. He___ mistakes and it___him a lot of harm.a)make,does,b)does,makes,c)made,did,d)makes,did. 16. My father is a journalist. He ___ articles for newspapers.a)writes down,b)translates,c)looks through,d)writes. 17. Please,___slowly. a)tell,b)speak,c)don^t say,d)understand. 18. I couldn^t buy___book___. a)this,anywhere,b)a,nowhere,c)an,somewhere,d)-,anywhere. 19. There ___ snow on the road. a)is any,b)are much,c)will some,d)is some. 20. I hope my plans do not ___ with yours. a)interrupt,b)observe,c)interfere,d)interest. 21. If you don^t know a word ___in a dictionary. a)look it up,b)look for it,c)look after it,d)look through it. 22. I want tea___coffee.a)in spite of,b)instead of,c)except for,d)because. 23. Where do you___? -I am from Russia.a)get from,b)are from,c)come from,d)go from. 24. ___Canaries are___ good place to have a rest for those who enjoy the sun.a)The,a,b)_,the,c)The,an,d)_,_. 25. Her yellow dress catches everyone^s eye___. a)at least,b)slowly,c)immediately,d)at the same time. 26. ___ do it,he is too young.a)Not to let him,b)Let him not to,c)Do not let him to,d)Do not let him. 27. Let^s ___ into two groups and start looking for them.a)divide,b)separate,c)isolate,d)share. 28. This room has such a nice ___over the sea. a)look,b)view,c)sight,d)appearance. 29. I am going to tell ___about it, I promise to keep it a secret.a)anybody,b)somebody,c)everybody,d)nobody. 30. I___ all that newspapers say. a)am not believing,b)not believe,c)don^t believe ,d)doesn^t believe. 31. Let^s go. The ___,the___. a)sooner,better,b)sooner,best,c)soonest,well,d)soonest,good. 32.It is typical ___ woman. They all behave the same in this situation. a)of some,b)from a few,c)for any,d)with many.