автомобиль массой 3 000 кг движется со скоростью 10 м\с . Чему равна его кинетическая энергия?

-определите объем железного бруска ,на который при погружении в спирт действует выталкивающая сила 19,6 Н

Помогите перевести точный перевод. Healht Farm «Thousands of teenagers are overweight»,says Health Farm manager Mr.White,«many teenagers often do not know how to eat well and stay healthy,like Karen». Karen was 13 years old.She weighed 110 kilos and was 1.55 m tall.Karen usually had a large bowl of cereal with a few spoons of sugar for breakfast.At school she always bought a chocolate at break time and every lunch time she had fried chicken and was chips .In the evening Karen usually had more fried food and she often ate a packet of biscuits or a box of chocolates in front of the television.She sometimes went out for a take-away Chinese meal or pizza before going to bed.Karen never ate any fruit and she rarely had fresh vegetables.Her main exercise was changing the TV channel or opening the fridge door. Healt Farm helped Karen with her diet and exercise plan.She now eats lots of fresh fruit and vegetables and goes swimming regularly- she never did any sport before because she was always so worried about her size.She now weighs 60 kilosaand.is still losing.weight.Mr.White says ,«Teenagers often come to the Farm depressed and with very little confidence.When they leave us they are usually happier and much more confident about themselves».

Расплачиваясь за покупку 3 елочных игрушек,покупатель получил сдачи 50 рублей.Если бы он купил 5 таких игрушек,то ему пришлось бы доплатить 50 руб.Сколько стоит 1 елочная игрушка?