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> > If I remember from my 8th grade new math course > 1=meter > .1=decimeter > .01=centimeter > .001=millimeter > > > 1000=kilometer > 100=decameter > 10=???????? What's 10= > 1=meter > .0=deci > etc etc > Jeff > 100=decameter wrong !! it should be 10=decameter, but anyway decameter is not commonly used. 100=hektometer, but this is not used either. Further more: 10 meters of water is 1 bar weight of one liter of water = 1 kg volume of one liter of water = 0.001 m^3 Easy isn't it ? Question: a divers has a breahting rate of 20 liters/minute. He has a 10 l (liter) tank filled with 200 b (bar). How long can he stay at 30 m (meters) ? Answer (straight forward): He has a total volume of 200 * 10 l of air at 1 bar. In 20 m depth we have 4 bars, so the divers has 4 times less volume to breathe than at the surface = (200 * 10)/4 l. As he consumes 20 l/minute he can stay (200 * 10)/4/20 minutes = 25 minutes (we don't account for the fact that he cannot empty the tank completely due to the pressure of 4 bars). Imaging the same question with US units. Michael Walz walz@la*.ep*.ch*
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