When I run the hot tap at work very slowly it looks very cloudy, in fact its loads of tiny little bubbles. If I run the water faster they dissapear. I'm guessing some sort of cavitation is taking place.

Strangely this doesn't happen with the hot water at home.

Has anyone elso noticed this phenomonom?

cheers

fj

When water freezes inside various tubs and containers, sometimes the ice has large holes in it. They are roughly flying-saucer shaped and filled mainly withy air, but can also contain some liquid water. Dissolved air forms small almost cylindrical bubbles, but how are the large holes formed?