Location A is 1.90 m to the right of a point charge q. Location B lies on the same line and is 4.40 m to the right of the charge. The potential difference VB - VA = 48.0 V. What is the magnitude and sign of the charge?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve