The communications of the ship were made inoperable by electromagnetic waves sent by the death star that were completely out of phase with attempted communications causing a. reflection b. refraction c. constructive interference d. destructive interference

when earth is in rotational motion around the sun,it displaces from its place.

when a ball is placed on an inclined surface it does both the rotational and circular motion.

explanation:

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.