How fast was a 1400KG car travelling if it lost 280KJ of kinetic energy in coming to a stop

Rohit is trying to tune an instrument

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

In general what determines whether atoms will form chemical bonds?