Водяной пар при температуре 100°С, сконденсировался в воду той же температуры. Как изменились при этом объем, масса, вес, плотность и внутренняя энергия вещества?  
поставлю лучший!

Объедините следующие предложения, употребив нужную форму причастия:

1. I saw her in the street. She was buying vegetables. 

2. She found nothing interesting in this new book. She didn't read it up to the end. 

3. this is my girlfriend. She lives next door to me. 

4. She was cryin. She was lasking for help.

5. I finished all the letters. I waen to have a smoke.

6. He saw the boy. The boy was crossing the street.

7. She watched the artist. he was painting a horse.

8. The boy lost his keys. He had to wait for his mother to come.

9. Grandmother was sitting in the armchair. Her eyes were fixed on her husband's portrait.

10. This is a very popular performance. The performance is much spoken about.