A student observes interactions between two sets of electrically charged objects. In each set the objects carry either a charge of -1 or +1 Coulomb. Which question can a student asked to identify the sex with a stronger interaction?
A- how large are the objects in each set?
B- what is the mass of each object in the interactions?
C- how far apart are the objects in each interaction?
D- Are the objects both positively charged or both negatively charged?