Can someone proofread my Big freeze theory of the universe? does it make sense?

Apositive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?