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NAUI Master / Physics

Physics Test. NAUI Master / Physics. Weight or Mass. Volume. Density is defined as the _____________ per unit __________ of a substance.

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NAUI Master / Physics

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  1. Physics Test NAUI Master / Physics Weight or Mass Volume Density is defined as the _____________ per unit __________ of a substance. • 2. Archimedes Principle states that “an object partially or wholly immersed in a fluid is buoyed up by a force equal to the _________ of the _______ displaced by that object”. Weight fluid

  2. Physics Test NAUI Master / Physics 3 cu. ft. X 64 lbs. = 192 lbs. What is the difference in weight between three cubic feet of fresh water and the same volume of sea water? • 3 cu. ft. X 62.4 lbs. = 187.2 lbs. • 4.8 lbs.

  3. Physics Test NAUI Master / Physics A dive team wants to recover (lift) a 410 pound (dry weight) anchor from the bottom of the ocean. The anchor displaces 1.8 cubic feet of sea water. The bottom composition is flat and firm. How many lift bags, rated for 50 pounds of lift each, will it take to recover (lift) the anchor? W = V x D • 410 lbs. • 1.8 cu. ft. x 64 lbs. = 115.2 lbs. • 294.8 lbs. • 294.8 lbs. ÷ 50 lbs. = • 5.896 bags

  4. Physics Test NAUI Master / Physics Conduction – water 20 times more than air! 5. One way that heat loss occurs during diving activity is through:

  5. Physics Test NAUI Master / Physics 3.29 ata or 48.4 psia 6. The absolute pressure at 75 feet of fresh water is: .432 psi x 78 ffw = 33.7 psi + 14.7 psi = 48.4 psia

  6. Physics Test NAUI Master / Physics A sealed flexible container with 12 liters of air is submerged to a depth of 90 feet in the ocean. Providing there is no temperature change in the water between the surface and at 90 feet, what is the new volume in the container at 90 fsw?

  7. Physics Test NAUI Master / Physics 8. An air consumption rate of 30 psig per minute using a 3000 psig / 80 cubic foot cylinder is equal to how many cubic feet per minute?

  8. Physics Test NAUI Master / Physics 9. If a diver has a Surface Air Consumption rate of 30 psig per minute with an 80 cubic foot / 3000 psig cylinder, the same cylinder will last approximately ____ minutes at a depth of 90 feet of sea water if the diver begins his/her ascent with 1000 psig remaining as a safety measure? 3000 psig - 1000 psig = 2000 psig

  9. Physics Test NAUI Master / Physics What Equation do we use? If a cylinder contains 80 cubic feet of air at a pressure of 3000 psig, approximately how many cubic feet of air remains in the cylinder at a pressure of 2600 psig if the cylinder temperature remains constant? Ratio or Percentage!

  10. Physics Test NAUI Master / Physics The partial pressure of oxygen in air at a depth of 130 feet of sea water is:

  11. Physics Test NAUI Master / Physics Henry’s Law states that the amount of gas that will dissolve into a solution is _________ proportional to the partial pressure of that gas and __________ proportional to the absolute temperature. Directly Inversely

  12. Physics Test NAUI Master / Physics 13. A dive team diving in a fresh water lake in the summer is at a depth of 20 feet. The water temperature at this depth is 85ºf and one diver in the team has 4 liters of air in her (BC). As the team descends to a depth of 60 feet, they pass through a thermocline and the water temperature is now 55ºf . If the diver with 4 liters of air in her (BC) did not add or remove any air, what is the new volume of air in her BC at 60ffw?

  13. Physics Test NAUI Master / Physics 13.

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