Найдите значение выражения 5 - 20 sin^2 x * cos^2 x, если sin2x = - 1\5

 Complete the sentences using Conditional II and III.

1 If people …(take) bottles, newspapers and cans to special bins, they could be recycled.

2 If I …(be) you, I would join Greenpeace.

3 If we didn’t pollute our seas, they …. (be) full of fish.

4 If I were you, I ….(continue) the exploration.

5 If you had read these books, you …(know) more about this environmental problems.

6 If we had protected the environment seriously, our planet …..(be) out of danger.

7 If people ….(avoid) damaging nature, many species of animals wouldn’t have disappeared.

8 If she ….(hear) the conversation, she wouldn’t have come there.

Рассчитайте сколько молекул содержат 66 грамм газа СО2 ( если не сложно с дано найти и решение) заранее спасибо

какая сила тяжести действует на Земле на тело массой 100г?1.5 кг? 600кг? 1.2т?