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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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This is an online simulation of how sound changes due to environment. How does place--like a cave, a pier, or a forest--affect certain sounds?

free Ages 4 - 8 5 to 10 minutes