Shared Flashcard Set

Details

Diving
NOAA Atmospheric and Hydrostatic Pressure
25
Other
Not Applicable
12/07/2003

Additional Other Flashcards

 


 

Cards

Term
What is the definition of pressure?
Definition
Force per unit area, e.g. pounds per square inch (psi)
Term
Pressure _______ with altitude.
Definition
Decreases
Term
The weight of air at sea level is ____.
Definition
14.7 pounds per square inch
Term
Pressure ________ with depth.
Definition
Increases
Term
The term for the weight of one square inch of air the height of the earth's atmosphere is called _____.
Definition
One atmosphere or 1 ATM
Term
What is the depth of one atmosphere of fresh water.
Definition
34 feet
Term
What is the depth of one atmosphere of sea water.
Definition
33 feet
Term
Salt water pressure is ______ psi per foot of depth.
Definition
.445 psi
Term
Fresh water pressure is _____ psi per foot of depth.
Definition
.432
Term
33 feet of sea water is equal to ______.
Definition
One atmosphere
Term
34 feet of fresh water is equal to ______.
Definition
One atmosphere
Term
How many psi is equal to 33 feet or 1 atmosphere of sea water?
Definition
14.7 psi
Term
How many psi is equal to 34 feet or 1 atmosphere of fresh water?
Definition
14.7 psi
Term
Absolute pressure is made up of _______ and ______.
Definition
Gauge (water) pressure (psig) and atmospheric (air) pressure (psia).
Term
What is gauge pressure?
Definition
The pressure of water (psig) as it reads on a depth gauge.
Term
What is atmospheric pressure?
Definition
Air pressure (psia) at a given height above the water.
Term
One atmosphere can also be stated as ___ ATM, ___ FSW, ___ FFW, ___ PSI and ___ mm Hg.
Definition
1 ATM, 33 FSW, 34 FFW, 14.7 PSI and 760 mm Hg.
Term
What do the initials ATA stand for?
Definition
Atmospheres absolute
Term
What do the initials ATM stand for?
Definition
Atmospheres
Term
What do the initials FSW stand for?
Definition
Feet of sea water
Term
What do the initials FFW stand for?
Definition
Feet of fresh water
Term
What do the initials PSI stand for?
Definition
Pounds per square inch
Term
What is mm Hg?
Definition
Millimeters of Mercury
Term
How much does a cubic foot of sea water weigh?
Definition
64 pounds
Term
How much does a cubic foot of fresh water weigh?
Definition
62.4 pounds
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