Can a Ping Pong Ball Really Sink a Basketball? - Andrea Zevedo

July 30, 2026 · Andrea Zevedo

Can a Ping Pong Ball Really Sink a Basketball?

Videos of impossible science experiments spread fast on Discover. Viewers love testing ordinary objects in surprising ways. This question mixes buoyancy, density, and air pressure in a simple setup.

Can a Ping Pong Ball Really Sink a Basketball? is a fun way to compare densities. The hollow ball floats easily, while the heavy ball needs very hot water to sink. Studies indicate temperature changes in water shift how objects float or sink.

Air trapped inside shapes how these toys behave. Warm water makes the basketball less dense than cold water. Meanwhile the ping pong ball already has little mass and lots of trapped air. Research shows materials with lower average density float on water.

A dense object in hot water can briefly sink before rising again. Simple tests turn everyday items into quick science lessons.


Can it really happen with normal tap water?

Not under standard conditions; the ping pong ball stays on top.


Q: Will hot water change the outcome?

A: Hot water can briefly lower the basketball density enough to sink.

Q: Does size always decide who floats?

A: Density and air pockets matter more than size alone.

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