How Long Do Batteries Last?

Hypothesis:  Batteries that weigh the most last the longest.

Hypothesis:  Batteries that cost the most last the longest.

Equipment:

1 – Balance

1 – Clock

3 – Flashlights (all similar)

3 – Different brands or types of batteries

Procedure:

1. Weigh each pair of batteries, and write down the weight of each pair.

2. Write down the cost of each pair of batteries.

3. Place each matching pair of batteries into a flashlight and ready them.

4. Turn on all of the flashlights at the same approximate time.

5. Mark the time that the experiment begins.

6. Mark the time as the batteries begin to fail.

7. Graph your results.  Time vs. mass, and time vs. price.

 Battery name:                          Cost:                            Weight:                Time:

 ___________                      ________                       ______              ______            

 ___________                      ________                       _______             ______

 ___________                      ________                       _______             ______

 ___________                      ________                       _______            _______

Which battery lasted the longest?  _______________________________ 

Which battery proved the best value?  ____________________________

Zero to Einstein in 60 seconds, The Wild Goose Company, pp. 14-16.

http://nerdscience.homepage.com/soapboats.htm

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http://clubs.yahoo.com/clubs/scienceconnection

http://www.illusionworks.com/

 

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