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Вопрос по физике:
Определите массу тела которому сила 50 мН сообщает ускорение 0,2 м/с^2 Какое перемещение соыершило тело за 30 с от начала-
Автор:
hopkins
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Согласно второму закону Ньютона:F = m * a, где F – сила, которая сообщает телу ускорение ( F = 50 мН = 0,05 Н), m — масса тела ( кг ), а — ускорение тела ( а = 0,2 м/с² ).Масса тела:m = F / a = 0,05 / 0,2 = 0,25 кг.Пройденное телом расстояние с учетом того, что начальная скорость тела равнялась нулю:S = а * t² / 2, где t — время движения тела ( t = 30 с).S = а * t² / 2 = 0,2 * 30² / 2 = 90 м.Ответ: Масса тела равна 0,25 кг, тело прошло путь равный 90 м.
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Вопрос по математике:
Найди неизвестное число. 45010-(к-28037)=5379. m-(56084-38600)=86917. 6870+(n-49980)=7436. (74109-t)+3367=70258-
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Вопрос по английскому языку:
1. Choose the right variant: He thought that he ___ in a bank.
A) Worked
B) Work
C) Is working
D) Works
E) Am working
2. Complete the sentence: Please, clean … blackboard:
A) TheB) AnC) AD) Those
E) Some
3. Fill in the blank: She reads …. books.
A) Many
B) Little
C) Much
D) Every
E) One
4. Choose the right variant…… do you live?
A) WhereB) WhomC) WhichD) WhatE) Who5. Complete the sentence:Please, bring me … apples.
A) SomeB) AnybodyC) NothingD) SomeoneE) One6. Complete the sentence: We arrived … England last week.
A) inB) onC) toD) forE) at7. Choose the right variant : We … to Ireland for our holidays last year.
A) WentB) GoingC) GoesD) Have gone
E) Go8. Complete the sentence. The building … last year:
A) Was builtB) BuiltC) BuildD) Are buildingE) Were built9. Complete the sentence: I … be in time for work:
A) MustB) CanC) Am able toD) MayE) Could10. Choose the right variant: Is that my key, or is it ?
A) Yours
B) The yoursC) The your’s
D) Are you
E) Your11. Choose the right variant: What are you going to do ____ afternoon?
A) This
B) His
C) It
D) Same
E) Its12. Complete the sentence: We haven’t got … bread
A) Any
B) SomeC) The moreD) NoE) Something13. Choose the right variant: Lion is the …. Animal
A) Strongest
B) Most strong
C) As no strong as
D) Stronger
E) As strong as
14. Choose the right variant: We were ____ late
A) Terribly
B) Terrible
C) More terrible
D) Much terrible
E) Terribler
15. Choose the right variant: When I looked round the door, the baby … quietly
A) Was sleeping
B) Were sleeping
C) Are sleeping
D) Slept
E) Is sleeping16. Complete the sentence: The Tower of London … with the royal dynasties:
A) Is connectedB) ConnectedC) Is connectingD) Will connectE) Connects17. Choose the right variant: When I ____ home I met my brother.
A) Was going
B) Gone
C) Go
D) Goes
E) Was gone
18. Complete the sentence: How long …. at the airport?
A) Have you worked
B) Does you work
C) Would you work
D) You have worked
E) Does you worked
19. Choose the right variant: He picked up the letter ____ on the floor.
A) Lying
B) Lain
C) Having lain
D) Lay
E) Laid
20. Choose correct noun in plural form:
A) Dresses
B) Dresess
C) Dressen
D) Dressis
E) Dress
21. Complete the sentence: They … their English in the morning:
A) Have
B) Has
C) Is having
D) have had
E) Was having
22. Choose the right variant: Peter and ____ are students.
A) I
B) Them
C) Him
D) Her
E) Us
23. Choose the right variant: I couldn’t see ___ eyes because she was wearing dark glasses.
A) Her
B) My
C) Their
D) Mine
E) His
24. Complete the sentence:… father is an architect.
A) His
B) They
C) She
D) Us
E) Hers
25. Complete the sentence: It costs four … dollars.
A) Hundred
B) A hundred
C) Hundreds
D) Hundredses
E) The hundred
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Ответов: 1
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4 года назад
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