Granular Materials as a Phase Change Model

July 8, 2015  Noah Edelstein

You job is to design a set of experiments that relate granular dynamics to phase change.  With your lab group you must write a problem and hypothesis, define variables, write a procedure, and record data from your tests.  Individually, you should write a finished lab report and a final conclusion.

All lab groups will have the same materials to conduct your experiment.  You will get a speaker box with moving piston, 2.5mm ball bearings, amplifier/receiver, smartphone with youtube capability.  You are not limited to these materials.  If you have ideas for other items you might use in your experiments, please check with your teacher.

 

Problem:  How can we relate the behavior of ball bearings in our speaker box to ideas of phase change?

 

Hypothesis:  If we put ball bearings into the speaker box and turn up the volume then they will behave like a solid, liquid, and gas.

 

Variables:  Be sure to record as many variables as you can think of.  A variable is something that can change in an experiment.  You may have several for each category.

Control:  a variable that remains the same throughout experiments   

Manipulated Variable (independent variable):  a variable that is purposely changed by a scientist throughout a set of experiments

Responding Variable (depending variable):  the outcome that is observed by a scientist that often changes in response to the manipulated variable

Record possible variables here for your set of experiments.

Control

Manipulated

Responding

     
     
     
     
     

 

Experiment Materials:

2.5 mm ball bearings

Speaker box

Receiver/Amplifier with settings of min, medium, max

Smartphone with youtube videos set to run 20 Hz, 30 Hz, and 40 Hz test tones

 

Procedure:

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Set Up Drawing:







 

Observations:

Written

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Frequency

Amp Setting

Angle

Ball Bearing Type

Outcomes

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

Test ___

         

 

Observation Drawings











 

Conclusion:

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