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Uploaded by tonymang2 on Feb 16, 2010
http://www.stmary.ws/highschool/physics/home/notes/waves/CharacteristicsPerio...This movie is part of the collection: Prelinger ArchivesProduction Company: ERPI Classroom Films, Inc. Distributed by Encyclopedia BritannicaAudio/Visual: sound, B&WCreative Commons license: Public Domain
Science & Technology
Standard YouTube License
okay, so if it was filmed in 2010(right?) so why is it al so old, or is just the effect?
MaryKings27 1 week ago
@MaryKings27 uploaded 2010. Filmed in the 40's
tonymang2 1 week ago
cool
wordauras 20 hours ago
fantastic ..old is gold ....great explanation ..
MultiMind100 1 day ago
great video sure its old but it gets to the point
sockpuppet1231 1 month ago
Great video! As dull as it may seem, it is very informative and clear.
grimslider75 7 months ago
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okay, so if it was filmed in 2010(right?) so why is it al so old, or is just the effect?
MaryKings27 1 week ago
@MaryKings27 uploaded 2010. Filmed in the 40's
tonymang2 1 week ago