Quieres comprobar que en la reacción de oxidación de un metal se cumple la ley de conservación de la masa. ¿Qué utilizarías para ello, un recipiente abierto o uno cerrado? ¿Por qué? Dibuja en tu cuaderno cómo realizarías esta experiencia.

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.