Two electrons in an atom are separated by 1.5 × 10−10 m, the typical size of an atom. What is the force between them? The Coulomb constant is 9×10 N·m /C . Answer in units of N.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.