Results of Our Experiment

We investigated how the volume of a sound affects its force. These were our results.

Volume              Force

95 db...................2.13x10^-4 N

97 db...................10.11x10^-4 N

98 db...................14.32x10^-4 N

100 db...................19.5x10^-4 N

Our Trial Run

This was the first successful trial run.

Altering the Procedure

Yesterday, we met up and did many test trials of our experiment. After many revisions, we finally got it to work. Below are the aspects of the project that we changed.

Alterations:

• To reduce the friction, we will replace the wooden dowel with a wire coat hanger and tie it to the end of a piece of thread and attach the other end to the ceiling. 
• The bottles will be taped to either end of the coat hanger. This will minimize friction and make the contraption more stable. 
• The bottles will be taped to either end of the coat hanger instead of being attached with rubber bands.
•  We will use a larger speaker than previously expected and center the contraption over it. 
• We will match the frequency of the bottle by recording the sound it makes when blown into, analyzing it with a computer program to find the exact frequency, and replicate it using a keyboard which will be hooked up to the speaker.

We will meet again in two weeks to implement these changes, and conduct our experiment with the variables (volume of the sound vs. velocity of the bottles), and we will record our results.

-The PhysicsTreeStinger Crew

(Annelise, Melanie, Colin, and Dominic)

An Experimental Decision

Today, we decided to use the second experiment (the one with the bottles) for our final project. We are investigating whether or not sound has force, and this procedure should help us get our answer. We will carry out the experiment over the weekend and report back with results next week.

-The PhysicsTreeStinger Crew

(Annelise, Melanie, Colin, and Dominic)