Reddit reviews Kangaroo 12" Rainbow Beach Balls (12 Pack); Inflatable 12pc Beach Ball Pool Toys
We found 1 Reddit comments about Kangaroo 12" Rainbow Beach Balls (12 Pack); Inflatable 12pc Beach Ball Pool Toys. Here are the top ones, ranked by their Reddit score.
12-Pack, Child Tested Inflatable Beach Balls - Each Beach Ball Made Of Highest Quality PlasticsKangaroo's Rainbow Beach Balls are 1 Ft in Diameter Deflated; Colorful Beach ToysAll 12 Designs Are Various Rainbow Striped; Primary Summer Toy ColorsPerfect Toys for the Beach, Sand & Water Toy Play Or Toys for Swimming Pool12 Beach Balls, One Dozen, Per Package - #1 Rated Pool Toys For Kids
reference beachball: https://www.amazon.com/Kangaroo-Rainbow-Beach-Balls-Inflatable/dp/B0194D3KW8/ref=sr_1_4?crid=1EAPSD5GSJ2YL&keywords=beach+ball&qid=1563536911&s=gateway&sprefix=beach+ball%2Caps%2C229&sr=8-4
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has a 12'' diameter, and weighs 0.019 kg. It will float if the weight of a 12" sphere of helium plus the 0.019 kg of the plastic is lighter than the same 12" sphere of air.
The volume of a 12" sphere is 0.127 cubic meter. Air weighs 1.225 kg / cubic meter, so that volume of air weighs 0.1556 kg.
Helium weighs 0.1645 kg / cubic meter, so that volume weighs 0.02 kg.
The ball of helium then weighs 0.04 kg, while the air is much heavier at 0.1556 kg, meaning the ball of helium will float.