Sound

	Determine the nodes for a sound wave.
	Calculate the wavelength and compare to predicted values.

Resonance Apparatus, tuning forks, rubber hammer, and thermometer.

	Move the reservoir can up to align its top close to the top of the resonance tube.
	Fill the reservoir can until the water level is about 14 cm on the resonance tube.

Attach 512 Hz tuning fork to the clamp with the prongs vertically over the end of the tube.

1. This lab works best with a group of two students.

Measure and record the room temperature on the Sound Data Collection Tool. Calculate and record the speed of sound using

t is room temperature in Celsius.

Start with 512 Hz tuning fork.

	Strike the fork with the rubber hammer.
	Remove the reservoir can from the stand and slowly lower the can until the sound intensifies.
	Locate the position of maximum intensity as closely as possible by raising and lowering the water level several times.
	Record the position of the water level as the 1st Node.
	Determine the 2nd and 3rd nodes by lowering the reservoir can.

Click diagram to view Longitudinal Standing Wave

Change to 384 Hz tuning fork.

	Strike the fork with the rubber hammer.
	Slowly lower the reservoir can until the sound intensifies.
	Locate the position of maximum intensity as closely as possible by raising and lowering the water level several times.
	Record the position of the water level as the 1st Node.
	Determine the 2nd and 3rd nodes by lowering the reservoir can.

Complete the calculations in Parts III and IV of the Data Tool.

The Lab Report for the group is due at the next class.