Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain?
125 grams

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 is an example of an exothermic process?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?