Approximately how much denser is the air a diver breathes at a depth of 20 metres as compared to the surface?

Question

diving physics

Answer 1

A lot, believe me, have you ever felt how much pressure you get in your ears at 20 meters.

Answer 2

You guys need to check your math.  When you go down to 20m, you have 1/4 the volume you had at the surface.  Remember, when you go down 1 atmosphere, you cut the volume in half.  When you go down another atmosphere, you cut the 1/2 volume in half again.  The air will be 4 times denser.

Answer 3

no clue im only 7

Answer 4

30 feet under water equals one atmosperic unit.

so if you were 30 feet under, it would feel like 2. one at sea level, and 1 additional from being 30 feet under.

20 meters is 60 feet so it would probably be around 3.5 atmospheric units.

I think the air would be 3.5 times denser. just a rough estimate though. there are calculators for this info on google.

Answer 5

right then this is the last one you get for free!!

at 20meters you are under the effects of 3 ata, 1 from the surface and 2 from water (assuming seawater), therefore as the air you breath leaves the scuba tank it is also under the effects of 3ata, and is effectively being squashed 3 times more i.e. 3 times more dense... hence you will get thru the air 3 times quicker than you would on the surface....

know some stuff dont I.....

Answer 6

It's just as dense as it was on the surface if it's in a tank.

Answer 7

Who breaths under water. Who?  Who?

I wanta know.  Isn't the air delivered to a diver the same as the surface?

Answer 8

Mmmm, divepete04  is more or less correct, however digital genius above was getting closer to the truth. What you must not do is get metres involved with Atmopheres they hardly belong in the same sentence. Your depth of 20metres is 3 Bar absolute not 3 ATA which equates to 33 feet. Imperial and Metric - keep 'em seperate.  

For each 33 ft you descend the pressure increases by 1 ATA and for each 10m you descend  the pressure increases by 1 Bar.

1 Bar = 14.5 psi

1 ATA = 14.7 psi - a very slight difference but a difference all the same.

So, the true answer to your question is that it is 3 times as dense ie 3 Bar absolute

Answer 9

its at 2 atoms so twice as dense going into the lungs and exhaled at the same rate  check  padi or bsac  scuda websites