An airplane (M = 5000 kg) is pulling a glider (m = 200 kg) along a runway. If they are accelerating at 7 m/s^2, what is the strength of the airplane's thrust?

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