1/5кг=___г ? выразить в указ.един.измер

Тело, брошенное горизонтально с высоты h=80 м, упало на землю на расстоянии l=60 м по горизонтали. Модуль перемещения тела за время,в течение которого модуль его скорости увеличился в n=2 раза,составит ...м

Пере фразируйте следующие предложения, употребляя сложное дополнение с причастем. 

E.g. He was reading in the garden. She saw him. She saw him reading in the garden.

1. We noticed a man. The man was cleaning his shoes.

2. He saw two girls. They were dancing on the stage.

3. She watched the children. They were running and playing in the garden.

4. I saw her. She was arranging her hair.

5. We saw our neighbor. He was listening to the latest news on the radio.

6. The cat was rubbing itself on my leg. I felt it.

7. We noticed a group of people. They were digging potatoes in the field.

8. Didn't you see her? She was smiling at you.

9. The girl was singing. I heard her.

10. They were talking about computers. He heard them.

11. You were walking along the street yesterday. I saw you.

На сторонах РО и РS треугольника ОРS взяты точки А и В соответственно так,что угол РАВ= углу S. Биссектрисса РС треугольника ОРS делит сторону ОS на два отрезка так,что ОС:СS= 4:3. найдите оношения РВ к РА

коэффициент полезного действия двигателя равняется 60%,что это означает?