Desde una azotea de un rascacielos de 120 m. de altura se lanza una piedra con velocidad de 5 m/s , hacia abajo. Calcular a) Tiempo que tarda en llegar al suelo, b) velocidad con que choca contra el suelo

Which statement best describes how private industry decides where to spend the money on research and development

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.