# Estándares PADI

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# Teoría

# Física

Because water molecules form weak bonds between themselves.

1.7 atm/bar (1.8 divide by 1.03)

Greater than

The volume of the Balloon would decrease

11 litres

(Using box method.. 2 x 5.5 = 11)

360 litres

(Using box method.. 60 x 6 = 360)

0.48 %

Even this can be worked out by the Box method!

the absolute pressure is 0.6 ( it says so in the question!) the approximate percentage of Nitrogen in the air is .80% so the calculation would be: 0.8 x 0.6 = 0.48)

0.105 %

(Using box method: 0.03 X 3.5 = 0.105)

3 times

(even this can by solved using box method: 1 x 3 = 3)

20 minutes

Using the box method: (70 divide by 3.5 = 20 minutes)

600 litres

( as it’s in fresh water, 720 – 120 = 600 )

277 litres

( as it’s in salt water, 377 divide by 1.03 = 366.

Then .. 366 – 89 = 277)

The pressure inside the cylinder will increase

550 litres

( as it’s in fresh water, 970 – 420 = 550)

51 litres

(as it’s in sea water, 68 divide by 1.03 = 66

Then .. 66 – 15 = 51 litres)