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| Demonstrates: Sound travels through a medium other than air. |
Description: Sound travels through a metal spring from one end of the phone to the other.
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Instructions:
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| Items Used: Notes: Works better than the string version you had as a kid. Math Description: None.
Size: 18' stretched out. Condition: Bad. Hazard: Tangling up the spring.
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| Schematic:
None. Tech Specs:
None. Web Links: |
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| History: |
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