Thu, 2021-01-21 17:47 — sal9000 How Sonar Works (Submarine Shadow Zone) - Smarter Every Day 249 Video of How Sonar Works (Submarine Shadow Zone) - Smarter Every Day 249 I forgot to add a description! 5 Average: 5 (2 votes)
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(Site Administrator)
A for awesome. This is precisely the thing they should show to kids in school to get them moving towards STEM.