Scuba c - Study guides, Class notes & Summaries

Which of the following is not true? A. Entering shallow water causes the base of a wave to slow. B. Entering shallow water forces wave energy upward, making the wave crest unstable and causing it to break. C. If the top of a wave moves faster than the bottom, the wave will tend to break. D. Both the first and third answers are true. (Ans- B. Entering shallow water forces wave energy upward, making the wave crest unstable and causing it to break. Which of the following is/are true? A. S...

PADI Open Water Diver Final Exam 2024 As you descend in water the pressure increases A depth change of 10 meters/33 feet causes a pressure change of 2 bar/ata A depth change of 10 meters/33 feet causes a pressure change of 2 liters The density of the air at 20 meters/66 feet would be _______ the density at the surface of three times A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________ during ascent to the surface. expand/burst As I descend, increasing pres...

Which of the statements concerning sound transmission underwater is incorrect? -A: Sound will travel farther underwater then in air -B: Divers find it difficult to locate the direction of a sound producing source -C: Divers find it easy to talk to each other directly through water -D: Sound travels four times faster underwater than in air C The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: -A: 2 ata -B:1 ata -C: 4 ata -D: 3 ata A ...

Define SCUBA - S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - First dive training agency to...

PADI Open Water Diver Final Exam Questions and Answers Latest Updated 2024/2025 | Rated A+. I blow up a balloon, tie it off, and take it to the bottom of the swimming pool. What will happen to the balloon and the air inside it? A The balloon will get bigger and the air inside the balloon will be less dense (molecules move further apart). B The balloon will get smaller and the air inside the balloon will be more dense (molecules move closer together). C The balloon will get bigger and the a...

E If a ≠ b and 1/x + 1/a = 1/b, then x = A. 1/b - 1/a B. b - a C. 1/ab D. a - b/ab E. ab/a - b C The graph of which of the following equations is a straight line parallel to the graph of y = 2x ? A. 4x - y = 4 B. 2x - 2y = 2 C. 2x - y = 4 D. 2x + y = 2 E. x - 2y = 4 A An equation of the line that contains the origin and the point (1, 2) is A. y = 2x B. 2y = x C. y = x -1 D. y = 2x +1 E. y/2 = x - 1 E An apartment building contains 12 units consisting of ...

PADI, Open Water Diver, Final Exam Review D float. Salt water is heavier than fresh water because it has dissolved minerals in it. This means it causes more upward force (buoyancy) on an object. An object that is neutrally buoyant in fresh water would float in salt water because there is greater upward force. See Being a Diver I - Buoyancy and Controlling Buoyancy. 1) If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would ...

SSI Open Water Diving Certification 2023 new material questions and answers Which of the statements concerning sound transmission underwater is incorrect? -A: Sound will travel farther underwater then in air -B: Divers find it difficult to locate the direction of a sound producing source -C: Divers find it easy to talk to each other directly through water -D: Sound travels four times faster underwater than in air - ANS C The absolute pressure expressed in terms of atmospheres absol...

Boat Ed temporary boaters test answers already passed What is the risk when a PWC passes too closely behind another boat? The other boat may create a blind spot for the PWC operator Vessel operators involved in a reportable boating accident must report the accident by the quickest means possible to: all the above A boat's capacity plate gives the maximum weight and/or number of people the boat can carry safely in certain weather conditions. What are the conditions? good weather When you see ...

How big do Objects under water appear Objects appear 33% larger underwater. How far away do objects appear underwater? Objects appear 25% closer. How much faster does sound travel in water, compared to air? 4 times How fast does Water conduct heat away from your body 25 times faster than air does As you descend what happens to colors and which colors? colors fade, reds and oranges fade first, 30 meters seem blue and gray At what water temp does your body need thermal protection < 8...