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): 3A20.80 Set up time:1 minute Operation: Shake the cup to send large waves down the spring and create sounds similar to whale songs or star trek laser blasts. Speak into the cup and the spring will create an echoing effect. Physics and Science Concepts: Oscillations and Waves Safety: Do not hyperextend slinky.
PIRA Code(s): 3D46.16 Set up time:no setup required Operation: Place the boxes with open cavities facing, one box length apart. Strike the first tuning fork with the striker. Stop the vibrations with your hand. Listen closely for the sound coming from the second fork. Physics and Science Concepts: Waves and Oscillations Safety: None