Two balloons are charged with an identical quantity and type of charge:-0.4 C. They are held apart at a separation distance of 20 m. Determine the magnitude of the electrical force between them.
A.5,400,000 N
B.3,600,000 N
C.1,800,000 N
D.1,200,000 N

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon