Scientists can alter plants such as this potato plant in order to produce bigger and better potato crops. To do this, scientists alter specific found in the DNA of the plants' cells.

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?