The blue bumper car 100 kg is moving 10 m/s to the East and collides with a red bumper car 100 kg moving 4 m/s to the West. They stick together after the collision. What is their final velocity?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

=force × distance a. work b. velocity c. pressure d. momentum

30 points - 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