An automobile traveling on a straight, level road at 15 km/h speeds up to 90 km/h in 50 s. what was the magnitude of the auto's acceleration, in meters per second squared?

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