Тапсырма 1 Суретте бейнеленген процестер қалай аталады?
а) б)

1.mozhete not rewrite the essay. 2.mozhete stay: in fact you have the time. 3. you can stay if you want. 4. you do not have to stay if you do not want. 5. you do not have to talk to him about it. 6. can you tell him about it. we can not repeat these rules: we know them. 7. it must be home now. 8. they maybe came to us yesterday, but we were not at home. 9. it can not be that he did not know this picture. 10. you do not have to go there: they are very bad people. 11.tebe should go there: they are waiting for you. 12. can i look at your picture? 13. it can not be that he was for so many years: he looks very young. 14. if my sister will not buy me a coffee, i have to go to the store itself. 15. i can not find my watch. i could not leave them at work. 16. i had a lot of books when i was preparing the report. 17. you can not immediately agree: think a few days. 18. can you show me your picture?

Δp= 2.2*10^7 кг*м/с

Объяснение:

Импульс тела. Т.к. тело (поезд) движется прямолинейно, то векторную сумму импульсов можно заменить алгебраической:

p=mv;

p_1=mv_1;

Δp=p_1 - p, здесь

p - импульс тела (поезда) до увеличения скорости, кг*м/с

p_1 - импульс тела (поезда) после увеличения скорости, кг*м/с

m - масса поезда, кг

v - первоначальная скорость поезда, м/с

v_1 - скорость поезда после увеличения, м/с

Δp - изменение импульса, кг*м/с

Δp= m*v_1 - m*v= m*(v_1-v);

Переведем величины в систему СИ:

v=30 км/час=8.3 м/с

v_1=70 км/час=19.4 м/с

m=2000 т=2*10^6 кг

Δp=2*10^6*(19.4-8.3)=22200000=2.2*10^7 кг*м/с