A 1500kg car rounds a turn with radius 60m. If the car has a coefficient of friction with the ground of 0.7, what maximum speed can it go around the turn without slipping? (Hint: what force provides the centripetal acceleration?)

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