IDC Physics. PADI Dive Theory Syllabus. Boracay El Nido Palawan Philippines

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IDC Physics.

John Dalton, Professor, Harris Manchester College, Oxford (1793).

IDC Physics. PADI Dive Theory English. Philippines―Boracay; and El Nido, Palawan.  Course Director Dan Robinson.

What IDC Physics questions can PADI ask me on my Dive Theory Exams on my IE?  What IDC Physics do I need to know before my IDC?

You need to score a min. of 75 per cent. on the 12-question IDC Physics Exam on your IE.  You may make a max. of three mistakes.  You need to do this on your IDC before you pass it and can go on to an IE.  On your IE you may have a max. of one make-up from the five Dive Theory subjects.  Those who have problems with Dive Theory often do not pass IDC Physics.  If you fail two or more of the five, you will need to wait, pay a re-sit fee, join a second IE and pass them all one more time.

The topics below come from the 2010 PADI DM Course.  The 2011 DM Course is more easy.  IDC Physics did not change.

I. Light, Heat and Sound in Water
1. Why does water dissipate body heat faster than air does and at what rate does it do so?
2. What effect does water’s ability to dissipate heat have on a diver?
3. What does light do when it passes from air into water, or vice-versa and how does this affect a diver?
4. What is refraction?
5. What is visual reversal and how does it affect a diver?
6. Why does sound travel faster in water than in air and how much faster is it in water?
7. How does the speed of sound in water affect hearing?

II. Buoyancy and the Weight of Water
8. Given the weight and displacement of an object, calculate the buoyancy change by adding air or adding weight required to either float, sink or make neutral the object in both fresh and sea water.

III. Pressure and Water
9. What is meant by gauge, absolute, and ambient pressure?
10. Calculate the absolute and gauge pressure at any depth in fresh or sea water in atmospheres/bar and convert it to another pressure measurement.

IV. The Relationship of Pressure and Gas Volume, Density and Temperature
11. What is the relationship between changes in absolute pressure and the volume of a gas?
12. Calculate the volume changes that occur to a gas when raised or lowered in the water in a flexible container.
13. What is the relationship between depth and the density of the air a diver breathes?
14. Given a diver’s air consumption rate at one depth, calculate how that consumption rate changes with depth.
15. What is the relationship of pressure, volume and temperature with a gas in a flexible container and with a gas in an inflexible container?

V. The Behaviour of Gases Underwater: Partial Pressures
16. What is partial pressure?
17. Given their percentages, calculate the partial pressures of gases in a mixture at any depth.
18. How does the physiological effect of breathing a given percentage of gas at depth compare to breathing the same percentage of the gas at the surface?
19. For a given percentage of a gas in a mixture and the depth at which a diver breathes that gas, calculate the percentage of the gas that would produce the same physiological effects on a diver at the surface.

VI. The Behaviour of Gases Underwater: Gas Absorption and Elimination
20. What happens when you raise the pressure of a gas in contact with a liquid?
21. What is super-saturation?
22. What happens when you quickly reduce the pressure on a liquid that is saturated with dissolved gas at a higher pressure?

Multi-award winning PADI Course Director Dan Robinson, training confident, effective and efficientSM dive educators.

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