Tueseday, I go to Auburn to interview for an open position in Alabama Science in Motion. http://www.auburn.edu/academic/science_math/cosam/announcements/ Basically, I would be traveling around high schools, moving equipment, doing demonstrations, and developing new labs. I need to come up with a <30 minute presentation as if to a high school audience. My idea is... Measuring reaction time with a meter stick. The equation for time is easy to derive. y=yo + vt + .5gt^2 t = Sqrt(2y/g) After taking data, we could discuss how many data points are needed, the difference between accuracy and precision, standard deviation, any number of things. Also, how else could you use a stick to measure time? If it's sunny, it could be a sundial, use it as a pendulum, make your own time unit of "stick swings" ok, my questions are... Is this a good idea? So far, I don't have 30 minutes yet, what could I fill with. This activity would obviously be fun and engaging, but is there enough physics in it? Any other ideas? If I do stick on this track, How else could you measure time with a meter stick?