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about 10cm2
100 million
about 144 ping pong balls are in a gross.
There is insufficient information in the question to answer it. How are the ping-pong balls hanging? By what? Are they touching? What is the orientation of the straw with respect to the ping-pong balls? Please restate the question.
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10 ping pong balls
No they do not.
Sure it can. But you'll need a lot a lot of ping pong balls- I believe the ratio is about 1 pound per 15 ping pong balls... then you can lift just about anything.
Approximately 19 million.
The number of ping pong balls needed to get a steel cube to float would depend on the mass of the steel cube.
On a scale of one to ten, the toxicity of Ping pong balls would be 1, because they are made of celluloid, which is not poisonous but flammable.
a number .