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): 3A10.40 Set up time:none Operation: Push the pendulum so that it swings back and forth at an angle of about 0 º. Then, slowly increase the angle, and watch the frequency decrease. For a more effective demonstration, start the pendulum at a relatively high angle, and then decrease the angle of the plane of oscillation so that the frequency of the pendulum will increase over time. Physics and Science Concepts: Oscillations Safety: None
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
PIRA Code(s): 6D20.10 Set up time:none Operation: For best results, observe the sun, moon, or fluorescent lights through the films. Physics and Science Concepts: Optics, Light Spectrum Safety: Keep fingerprints off film.
PIRA Code(s): 6D30.10 Set up time:none Operation: Shine light through the rings so that they are reflected onto a wall. An overhead is good for this. Turn the screws on the frame to change the interference pattern. Physics and Science Concepts: Interference Safety: Over head projector may be obtained from demo 9A36.10.