1)have just got back
2)walked
3)was
4)was
5)took
6)have arrived
7)improved
8)saw
9)Have you seen it?
P.S.я не уверена во всех ответах
Explore
past simple: explored
I think that the computer is useful because you can use it to do in a second what you used to do in weeks. On the computer, you can quickly find the necessary information, write material for the lesson, and even listen to your favorite music during the learning process.
People use computers to make their lives easier. My parents use this opportunity to communicate with me even at a long distance.
Thus, I believe that the computer has changed our world for the better, because with its help we have new opportunities.
Объяснение:
He's got - это сокращение от he has got. А вместо some нужно просто написать any.
1.He hasn't got any faxes on his table.
2.l haven't got any expensive models in my office.
3.Jim hasn't got any telexses in his mail.
4.John hasn't got any mistakes in his notes.
5. She hasn't got any facts.
6. I cann't give any examples.
Q1+Q2=0 (уравнение теплового баланса)
Q1= cmt (естественно вода, где за t я взял изменённую температуру, то что нам надо найти. c- постоянная величина, которую я взял из источника, m - в дано (: )
Q2= cmt (Тоже самое, только с гирей).
Итак.
Приравниваем получается (пишу без физических величин, т.к. вы и сами их сможете написать) P.s. перевод в систему СИ я показывать не буду.
0,6*4200*t+0,5* (20-80)*380=0
2520*t+(10-40)*380=0
2520t=15200-3800 (перенёс - знак поменял, получаем:)
2520*t=11400
<span>t=4,5 градуса (примерно)</span>