Which of these is not a source of the shock waves that lead to protostars?

The harmonic motion of a particle is given by f(t) = 2 cos(3t) + 3 sin(2t), 0 ? t ? 8. (a) when is the position function decreasing? (round you

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

What happens when you slowly pulled the carboard?