How many balloons would it take to life someone off the ground?
BrainStuff - Podcast autorstwa iHeartPodcasts
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Balloons are often filled with helium, which has a lifting force of one gram per meter. It's possible to assemble enough balloons to lift yourself from the ground -- but how many balloons does it take? Tune into this HowStuffWorks podcast to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com
