I've never seen a precise figure but 34'[1] is the figure that springs to mind, so not a bad approximation.
[1]Another approxomation I recall is the height of the ridge of the roof of a two storey house - no idea how accurate (or otherwise) that is, though.
Although this is a bit academic, it might be of general interest to someone. The International Standard Atmosphere defines sea level pressure as 1013.25 hPa; in the bottom part of the atmosphere, this decreases by approximately 1 hPa every 30 feet. The real-world sea-level pressure varies daily between (very roughly) min and max of 980 and 1040 hPa, so that's between about 32.8 and 34.8 feet of water. Here endeth the lesson ;-)
Is that using metric water?
Yup ;-)
(now recompute for heavy water!)
Hectopascals? really?
This is the first time I've ever seen them used.
Andy
Yup! It used to be millibars, but that became too familiar so it changed to hPa - even units get rebranded :-)
I've seen Pascals and kPa many times. It's the hecto that surprised me.
Andy
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