Desde lo alto de un edificio de 25 m de altura se lanza una pelota verticalmente hacia arriba con una velocidad de 10 m/s. Calcula: a) La altura máxima conseguida por la pelota. b) El tiempo que tardará en caer la pelota al suelo. c) La velocidad en ese momento.

From the top of a 25 m high building, a ball is thrown vertically upwards with a speed of 10 m / s. Calculate: a) The maximum height achieved by the ball. b) The time it will take for the ball to fall to the ground. c) The speed at that time.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray