Water Balloons! Oh wait...

Chemistry Level 2

If you rub a balloon with a cloth and put it near a water tap, the tap water will bend towards the balloon. This is due to what special property of water?

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Water Balloons! Oh wait...

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.