Name of the Group:

Members:

Date Performed:

Score:

Rating:

 

Objective:  make your own objective based on the given procedure...

Pre-lab activity:

1.     Read concepts related to the given activity.

2.     Read thoroughly the given procedure.

3.     Prepare the necessary materials.

Materials:

5 test tubes

1 Test tube rack

Metric ruler

Container of water

Rubber bands

box

Laboratory Activity 1:

1. Place the test tubes in the test-tube rack.

2. Pour different amounts of water into etch test tube.  Use the metric ruler to measure the height of the column of water in each test tube.  The heights should be as follows: 2 cm, 4cm, 6 cm, 8 cm, and 10 cm.

3. Blow air across the top of each test tube.  Observe the pitch of the sound you hear from each test tube.

Post-lab activity 1:

Questions

·         How does the height of the water affect the pitch of the sound?

·   _____________________________________________________________________________________________________

·   Which test tube had the highest pitch?____

·         Which test tube had the lowest pitch? ____

·   Draw a picture of the 5 water test tubes.

·   Mark the highest and lowest pitch test tubes. 2cm     4 cm         6 cm       8 cm     10 cm

 

Laboratory 2:

1. Each group will receive an assortment of rubber bands and boxes over which you can put the rubber bands. 

2.  Pluck the rubber bands and compare their sounds. 

    

Post-lab activity 2:

·         Which ones sound lower? _________________________________________________________________________

·         Why? ____________________________________________________________________________________________

·         Compare the sounds a rubber band makes when it is stretched tightly and loosely.  Explain how they are different.

·         _________________________________________________________________________________________________________

Follow- up activity:

The sound produced by blowing over the top of a partially filled soda pop bottle is the result of the closed-end air column inside of the bottle vibrating at its natural frequency. Keri Atune uses four bottles (labeled A, B, C and D) with varying amounts of water (and thus, air) in order to play a song. Express your understanding of closed-end resonance by filling in the table below.

© The Physics Classroom, 2009

Conclusion: