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): 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): 3B20.11 Set up time:2 minutes Operation: Lay the slinky down on the ground and push it back and forth lengthwise to make longitudinal waves. Physics and Science Concepts: Longitudinal Waves Safety: Ends of slinky may be sharp or may tangle.
PIRA Code(s): 3B30.30 Set up time:10 minutes (5 minutes to pump the bell jar) Operation: Plug in the pump and attach the clear tube of the pump to the valve. Turn the switch on the power supply to ascertain that the alarm is working properly. Then, pump out the air inside the bell jar. It will take about 5 minutes to obtain a low enough air pressure so that the alarm will not sound. Turn the alarm on and slowly open the valve, allowing the air pressure in the bell jar to increase. The sound of the alarm will also gradually increase. Physics and Science Concepts: Sound waves Safety: A glass jar containing a vacuum can be extremely hazardous if broken.
PIRA Code(s): 3D32.15 Set up time:No setup required. Operation: First, slide blow into the mouthpiece located at the top of the whistle. Next, move the piston to create different frequencies. If you have trouble moving the piston and blowing into the whistle simultaneously, have another person work the piston. Physics and Science Concepts: Waves, Oscillations, Frequency, Pitch Safety: Do not blow too hard or for extended periods of time as this may cause dizziness or headaches. Clean the mouthpiece in between use.
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): 4A30.10 Set up time:1 minute Operation: Use a Bunsen burner to heat a bimetal strip and it will bend Physics and Science Concepts: Thermodynamics, Thermal Properties of Matter, Thermal Expansion Safety: Use caution when dealing with the Bunsen burner. Bunsen burner not included.
PIRA Code(s): 4A30.20 Set up time:2 minutes Operation: Try putting the ring around the ball. At room temperature the ring is slightly larger than the ball. Heat the ball over a Bunsen burner and it will no longer fit through the ring. Physics and Science Concepts: Thermodynamics, Thermal Properties of Matter, Thermal Expansion Safety: Use caution when using a Bunsen burner. The Bunsen burner is not included in the experiment.
PIRA Code(s): 4C33.50 Set up time:No setup required Operation: Hold one bulb in your hand so that it forces the liquid to enter the other bulb. Physics and Science Concepts: Change of State, Vapor Pressure Safety: Do not grasp too tightly as the glass may break.
PIRA Code(s): 4E30.10 Set up time:5 minutes Operation: Fill sphere with water and submerge in buckets of water or liquid nitrogen at different temperatures. Dewar of liquid nitrogen and bucket can be obtained in the physics machine shop. Physics and Science Concepts: Gas Laws, Thermodynamics Safety: Always wear protective clothing when handling liquid nitrogen.