Предмет: Физика, автор: Supeeerwoomen

Расстояние между двумя населенными пунктами мотоциклист преодолел за 30 мин,двигаясь при этом со скоростью 10м/с.Сколько времени ему потребуется на обратный путь,если он будет двигаться со скоростью 15м/с
С дано и решением пожалуйста

Ответы

Автор ответа: dfkth

Дано
V1=10 м/с
t=1800 c
V2=15 м/с
S1=S2
t2-? S1=V1t1 S2=V2t2 t2=V1T1/V1 t2=10*1800/15=1200 c=20 мин

Похожие вопросы

Предмет: Русский язык, автор: miras201115

610. Какое из числительных не является
количественным?
А) пятеро
В) десять C) полтора
D) тысяча E) седьмой
611. Какое из слов не является числительным?
А) миллион В) тысяча C) полтора
D) единица E) сорок

6 лет назад

Предмет: Английский язык, автор: Dapi34

1- I don't know why this class is always so dirty
because it ___ every morning.
A) cleaned
B) cleans
C) was cleaned
D) is cleaned
2- If my car ___ by you, you will pay for the repairs.
A) were damaged
B) are damaged
C) is damaged
D) was damaged
3- A: Why didn't you play football yesterday? B:
Because________.
A) the match is cancelled
B) the match was cancelled
C) the match cancelled
D) the match were cancelled
4- A: How old is the tower? B: ___ to be over hundred years old.
A) It is believed
B) It believes
C) People believe
D) They believe
5- I learnt swimming when I was young. My
mother________.
A) teaches me swimming
B) taught me swimming
C) was taught me swimming
D) is taught me swimming
6- A: Who ___ ? B: Alexander Graham Bell.
A) was the telephone discovered
B) was the telephone invented
C) was the telephone discovered by
D) was the telephone invented by
7- How many mails ___ in a day?
A) do you send
B) is he sent by you
C) did you sent
D) was you sent by
8- ___ the robbers arrested yesterday?
A) Is
B) Was
C) Are
D) Were
9- Mary ___ the flowers that Tim bought for her
because ___ to the wrong address.
A) received / they were sent
B) didn't receive / they were sent
C) received / it was sent
D) didn't receive / it was sent
10- John was invited to the party but________.
A) he wasn't gone
B) he was gone
C) he didn't go
D) he went
11- A: When ___ ? B: In 1990.
A) did Max·s house built
B) were Max's house built
C) did Max's house build
D) was Max's house built
12- My grandfather ___ to my grandmother before he passed away.
A) did give that ring
B) were given that ring
C) was given that ring
D) gave that ring
13- Everybody________by the terrible news yesterday morning.
A) were shocked
B) was shocked
C) are shocked
D) is shocked
14- A new bowling alley ___ near our house by the Mayor last Sunday.
A) is opened
B) was opened
C) opens
D) opened
15- Someone ___ Tom the news immediately.
A) said
B) was said
C) told
D) was told
16- Bill expected to see Sharon at the party. He ___ when he saw her.
A) was surprised
B) wasn't surprised
C) didn't surprise
D) surprised

6 лет назад

Предмет: Математика, автор: duhnasta31

В ящик положили 4 лотки с яйцами, по 6 штук в каждом, а оставшиеся 8 яиц положили в холодильник. Во сколько раз больше яиц в ящике, чем в холодильнике?

6 лет назад

Предмет: Алгебра, автор: Albinochka1901

Помогите пожалуйста решить неравенство: 3sin2x>1

9 лет назад

Предмет: Алгебра, автор: ireena

Требуется упростить выражения.
Решения не нужно. Только ответы.
Прошу писать только если точно уверены в правильности своего решения.
Спасибо.

9 лет назад