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What happens when two wave pulses meet in the middle? Send waves down a spring to watch them travel and interact.

1 cent - $1 per student Ages 4 - 18 Under 5 minutes
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We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

free Ages 4 - 14 Under 5 minutes
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Sound can travel through a variety of media.

1 cent - $1 per student Ages 6 - 14 Under 5 minutes