scubagearhq.com » A bubble leaves a scuba divers regulator 30m down in the ocean.? http://www.scubagearhq.com Tue, 27 Sep 2011 12:08:49 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 A bubble leaves a scuba divers regulator 30m down in the ocean.? http://www.scubagearhq.com/scuba-regulator/a-bubble-leaves-a-scuba-divers-regulator-30m-down-in-the-ocean/ http://www.scubagearhq.com/scuba-regulator/a-bubble-leaves-a-scuba-divers-regulator-30m-down-in-the-ocean/#comments Mon, 28 Sep 2009 03:20:19 +0000 admin http://scubagearhq.com/scuba-regulator/a-bubble-leaves-a-scuba-divers-regulator-30m-down-in-the-ocean A bubble leaves a scuba divers regulator 30m down in the ocean. How big will it be when it reaches the surface

A. Same Size
B. Twice the Volume
C. 3 times the volume
D. 4 times the volume

1 barr (one normal atmosphere) = 10.2 meters of water pressure

30 meters of water pressure equal about 3 barr

so, the bubble starts at 1+3=4 (1 from the atmosphere and 3 from the water depth) barr of pressure and ends at 1 barr of pressure (from the atmosphere)

Because the pressure at the end is 1/4 the pressure at the start, the volume at the end is 4 times the volume at the start

I’d go with D. 4 times the volume

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