Outdoor basketball hoop question

[Tomes]

So life can happen underneath when the top is frozen. Useful in fresh water environments.

[Tomes]

[TURTLE]

This is Turtle.

Just fill it with Rocks and then fill in the rest of it with sand. Then in 10 years when it bust, Throw it away.

TURTLE

[Doug]

replying to Mark, Doug wrote: Water is most dense at 39 F (4 C). Therefore, as water approaches 32 F (but not isothermally), the least dense water (i.e. coldest) floats to the top and then freezes. In the bucket problem described above, I suspect the frozen ice was bonded to the sides of the bucket. Then as the rest of the water frozen under this ice cap it needed to expand upon freezing. Because the water (under the ice cap) is constrained, the pressure increases. In this case, as the pressure increase, the pressure needed to expand the walls of the bucket was lower than the pressure needed to push the ice cap upward. Result: expanded base of the bucket.

[Doug]

replying to Doug Kanter, Doug wrote: ethylene glycol is poisonous. Propylene glycol can be used as a food additive. Therefore, propylene glycol is a much better choice in this case.