No ... the inside of a ping pong ball is filled with air. Click on the 'Inside of a Ping Pong Ball' link below to learn more.
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What is the average speed of a ping pong ball in the olympics?
A ping pong ball is usually 2.7 grams.
It fixes the dent because the heat from the boiling water makes the air inside the ping pong ball expand, causing the dent to be filled out.
Books were used as paddles to hit the ball in Ping Pong with the game originated in the 1880's.
If they float in water, then it is because the density of a ping pong ball is lighter than the density of water. The density of water is just below 1, and the density of a ping pong ball is much less than 1.