Визначити концентрацію молекул кисню, якщо його тиск дорівнює 0,2МПа, а середня квадратична швидкість молекул становить 700м/с​

My best friend name is Olesya. I think she is a jack-of-all-trades. She is good to learn. She draws a great. Olesya good at riding horses. She wants to be an architect. Olesya plays the piano very good. So i think Olesya jack-of-all-trades. ! ИЛИ ТАКMy closest friend Shurik loved, it turns out, to count the crows, to beat the buckets and to drive the idler.At home he, as everyone heard in the quarter, did not hit a finger to help his grandmother. As his parents did not just get sick of returning from work, that they did not reprimand him, but he did not care. One evening, we, Shurik's friends, heard that in his place we would have been through the ground long ago and that we would have been tormented by remorse. And this, no matter what it is - in one ear flies in, the other flies. And this, he turns out, was, and when from the pot two vertices only made, and now, having grown up with the Kolomenskaya verst. Everything from him like a gusya's water, everything to him that's about the wall of peas. -

[_Привет всем!_]
ответ на вопрос.
Дано: F= 60Н
t=3 минуты
А= 14кДж
Найти: V(скорость) тележки-?
СИ:
3 минуты= 180 секунд
14кДж= 14.000 Дж
Решение.
По формуле работа А= F•S (произведению модуля силы F на путь S). Мы знаем, что расстояние S= Vt(произведению модулю скорости на время) =>
А= FVt ( мы заменили S на произведение)=> V= А: (F•t)
V= 14.000Дж: 60 Н • 180 секунд= 1,3 м/сек.
ответ. Скорость тележки равна 1,3 м/ сек.
Примечания: конечный результат округлили до десятых.
Надеюсь, я вам! Удачи в физике! Обращайтесь!=^.^=