How do air filters work?

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How do filters remove particles from the air - especially the small ones? Andrew Maynard explains all.

This video, and the associated pencil and paper version, were created to demonstrate how to make simple yet effective sketch-style science videos. They form part of a Science Showcase workshop on making effective science videos for researchers.

Both videos were filmed and recorded using an Apple iPod, and edited using Final Cut Pro (although for this type of video iMovie is rapidly becoming my video editing software of choice)
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very nice video and excellent explanation, thank you

boreddypavankumarreddy
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Nice job I hope u get more subscribers

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