6.Imagine standing near the door of a dog house. If a puppy comes running out every three seconds, what would the period of the exiting puppies be? s.

7.Considering the above, how many puppies (or fraction of a puppy) exit every second? s-1.

8.If a certain wave has a new wave crest created every 2.5 seconds, the period is s.

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

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

How do we measure or think of speed in the united states?