"Edgar" wrote in message . ..
| Thom, saturated steam is a vapor. Superheated steam is a gas.
| Both have the symbol H2O.
| Both are uncondensed liquid if you appreciate that most gases turn to liquid
| if you cool them enough.
| Humidity is not any substance. It is a measure of the amount of water vapor
| in the air.
| Relative humidity is the ratio betweeen the amount of water vapor in the air
| (at a given temperature) and the amount that would give 100% humidity.
| (100% humidity is the maximum the air could hold at that temperature without
| producing condensation.)
|
| Re your question about the composition of cavitation bubbles I give a
| personal opinion that they are mostly air. Water contains dissolved air
| (otherwise fishes could not breathe) and when the action of the propeller
| blades reduces the pressure some air has to come out of solution and shows
| as bubbles. All that talk about boiling is just BS.
| IMO
| Edgar


B.S. is right. Check it out, folks (DSK, in particular) Edgar represents another informed mind.

Paladin

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