The diagram shows the electric field lines around two charges. based on the field lines, what is the best description of the charges of the charges? a. they are negative, and they repel b. the left is negative and the right is positive so they attract. c. the left is positive and the right negative, so they attract. d. they are positive, and they repel.

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?