A ball shot at an angle of 60 degree to the ground strikes a building 23m away at a point 16m high. find the magnitude and direction of the final velocity of the ball as it strikes the wall

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