Plz help it is for a quiz. Plz help

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

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

Which atomic model was proposed as a result of j. j. thomson’s work?