Guess at what depth a Ping Pong Ball will crush?

[flyguy]

what about the defective ping pong balls that have a leak. If they descend slow enough, they'll never implode.

 

[miketsp]

..snip..
Now the serious question is how to control the descent in a DIR manner. The mass needed to sink 25 balls will be too much after the early failure balls loss their lift, so a method must be developed to prevent a runaway descent after the first few failures. Possibly a lift bag with a large opening could be positioned above the balls to capture any air that might escape from the crushed balls which would help somewhat offset the decreased buoyancy and it could be filled with additional air as needed to maintain neutral buoyancy for the duration of the test. An indented plate could be devised to hold the balls down without upsetting the test by adding undue point stresses on the balls, but should the plate be suspended between the weight and the lift bag with surgical tubing?
..snip..

Simple, just use one of H2Andy's famous water weights. After you sink the balls you throw the water away...

http://www.scubaboard.com/showthread.php?t=66241

 

[Bill51]

Simple, just use one of H2Andy's famous water weights. After you sink the balls you throw the water away...

http://www.scubaboard.com/showthread.php?t=66241

Archimedes wouldn’t have discovered anything about buoyancy and displacement if he hung out around this board. :rofl:

 

[ckaspar]

They tested this on the TV show "Mythbusters". I don't remember what the pressure was but it was impressive!