Определите высоту столба керосина, который оказывает давление на дно сосуда равное 8 10^3 Па

По наклонной плоскости с углом наклона 30 градусов соскальзывает тело в течение 2 с. Коэффициент трения тела о плоскость равен 0,1. Длина наклонной плоскости, по которой соскальзывает тело, равна...(в метрах)

ПЕРЕВЕДИТЕ ПОЖАЛУЙСТА НА РУССКИЙ БЛИЗКО К ТЕКСТУ:

1. The must - have thing for everyone is a mobile phone, but I think that only older people should have them. Children are just wasting money and time on them, and it could damage their health. A lot of teenagers are used to taking their mobile phones to school now, but I don't see the real need to because schools will phone home if there are any problems.

2. I don't worry that people are listening. If you're in a public place, you're fair game. They're just social calls and I don't talk that long, just make plans with friends, find out what everybody is doing. Before people had mobiles, back in the 1970s, how did they make plans for Saturday night? Mobile phones are the perfect way to organise last-minute parties. Word spreads fast from phone to phone. Send a text, wait an hour and everyone will be at your house, even the cops!

3. They are everywhere on the campus, going from class all student have mobiles stuck to their ears. I hear kids say all kinds of things on their phones, things I don't want to hear about ... silly, unnecessary chats.
You get mobiles in class too. There's rarely a lecture when somebody's mobile doesn't go off! I just can't get used to it!
I find it so annoying because mobile calls become more important that face-to-face conversations. When a mobile rings, conversations get put on hold. That doesn't seem right!

4. I use my mobile to call my husband to tell him I'm OK. Mostly I use it when I want to put somebody's mind at ease, if I'm running late or in an emergency. Even then, I'm still not sure when or where it's acceptable to make a mobile-phone call. I am concerned about talking on my phone and disturbing people near me. I think I'm quiet enough, but I still wonder if it is OK.

прямая MN касается окружности с центром в точке О, М-точка касания,угол МNO=30 градусов а радиус окружности равен 5 см найдите NO

Космический корабль имеет массу 3,5 т. При старте из его двигателя вырывается струя газа. А скорость космического корабля 800м/с. Расход топлива 0,2 кг/с. Найти реактивную силу и ускорения корабля