Brainstuff
Why do electric plugs have holes?
- Autor: Vários
- Narrador: Vários
- Editor: Podcast
- Duración: 0:02:03
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Sinopsis
You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.
