-
допоможіть будь ласка . за який час двигун потужныстю 100 Вт виконаэ роботу 2 кДж ? будь ласка з повним розв'язанням .
Ответы 1
-
P=100 Вт, A= 2 кДж = 2000 Дж. t-? За означенням P=A/t, звідси t=A/P,t=2000/100= 20 c.
-
Автор:
jadonfrench - 6 лет назад
-
0
-
-
Добавить свой ответ
Еще вопросы
-
Решите уравнение 9 x в квадрате минус 7 икс минус 2 икс равно нулю
-
Предмет:
Алгебра -
Автор:
lilaweaver - 6 лет назад
-
Ответов:
3 -
Смотреть
-
-
Помогите плиз.
1. Supply the article if necessary.
It is too long … way to go on foot.
A) a
B) an
C) the
D) —
2. Complete the sentence with the correct variant of the main verb.
The woman who … to my sister is our neighbour.
A) speaks
B) speak
C) have spoken
D) is speaking
3. Complete the sentence with the correct variant of the main verb.
Do you think the book is worth ...?
A) reading
B) read
C) to read
D) be read
4. Complete the sentence with the correct preposition.
He looked … with interest.
A) after
B) for
C) around
D) at
5. Correct the mistake.
He said that he was not there before.
A) hadn’t been
B) weren’t
C) won’t
D) hadn’t
6. Complete the sentence with the correct pronoun.
I haven’t seen Tom for … years.
А) some
B) few
C) no
D) any
7. Supply the articles if necessary.
… Volga is the longest river in … Europe.
A) the… —
B) an … the
C) a … —
D) — … the
8. Choose the correct pronoun.
She has cut …
A) her
B) herself
C) hers
D) his
9. Complete the sentence with the correct word.
Jack … me that the manager was very hard to deal with.
A) said
B) told
C) tell
D) talked
10. Choose the correct answer.
Which famous writer was born in Stratford-upon-Avon?
A) Samuel Beckett
B) James Joyce
C) William Shakespeare
D) Robert Burns
11. Choose the correct answer.
What’s the favourite drink of English people?
A) water
B) milk
C) tea
D) Cola
12. Choose the correct answer.
What is the name of English flag?
A) Union Jack
B) Union Sam
C) the Saint Andrew’s Cross
D) the Saint David’s Cross
13. Choose the correct variant.
Translate the name of the fairy tale «Red Riding Hood».
A) Вождь краснокожих.
B) Красный берет.
C) Красная шапочка.
D) Калина красная.
14. Choose the correct answer.
What is the capital of Wales?
A) Cardiff
B) London
C) Edinburg
D) Ottava
15. Choose the correct answer.
What part of modern Britain was called by the Saxons “the land of the foreigners”?
A) England
B) Wales
C) Scotland
D) Northern Ireland-
Предмет:
Английский язык -
Автор:
sandycherry - 6 лет назад
-
Ответов:
1 -
Смотреть
-
- Два сообщающихся цилиндра заполнены маслом (ρ=0,9 г/см3) до одинакового уровня. Площадь сечения поршня в правом цилиндре составляет 90% от площади сечения в левом
-
k3po4+agno3 Пачаны, плизз, составьте реакцию ионного обмена.
-
Предмет:
Химия -
Автор:
micaelamooney - 6 лет назад
-
Ответов:
1 -
Смотреть
-
Топ пользователей
-
Fedoseewa27
35934 -
Askold
2792 -
Pikachu
2228 -
hobbesbowers
2116 -
kaylynnbarron676
1818 -
女fei
1240 -
yulia-kaplina
1158 -
Poinntt
946 -
Bars
930 -
Queenmagic18
770
How much to ban the user?
1 hour
1 day
100 years