Such an oil drop falls 4.0 × 10−15 of , is held stationary when an electric field is applied between the two horizontal plates. If the drop carries six electric charges each of value 1.6 × 10−19 , calculate the value of the electric field strength

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