PIRA Code(s): 3A10.20 Set up time:1 minute Operation: Move the weight along the hacksaw blade. Pull back on the blade and release. When the weight is at the top of the blade the frequency is smaller compared to when the weight is at the bottom. Physics and Science Concepts: Oscillations Safety: Edge of blade may be sharp.
PIRA Code(s): 8A10.10 Set up time:none Operation: Plug in the model. Flip the right switch to have the planets move and the left switch to turn the light bulb on which represents the earth. Physics and Science Concepts: Planetary Astronomy, Solar System Safety: Do not touch the light bulb, it may get hot.