dive physics

Question 1

light is ___, ____, and _____ underwater

Answer 1

refracted (change in path due to velocity), diffused (scattered), absorbed (red first and blue last).

Question 2

sound underwater

Answer 2

4x faster that air, no directional determination

Question 3

Air composition
-O2:
N2:

Answer 3

N2: 78%
O2: 20.9%

Question 4

Common Atmospheric Pressure

atm? bar? mmHg?

Answer 4

1atm=1barr=760mmHg

Question 5

what is apparent weight?

Answer 5

actual weight - weight of fluid displaced (“Buoyant force” and based on water density)

Question 6

Charles Law

Answer 6

if pressure is kept at a constant, the volume of a gas is directly related w absolute temp

Vo/Vf=To/Tf

Question 7

Gay Lussacs law

Answer 7

if volume is held constant absolute pressure varies

Po/Pf=To/Tf

Question 8

Boyles Law

Answer 8

If temp is constant, the volume of a gas is inversely proportionate to the absolute pressure has a larger effect at shallower depth

(Po)(Vo)= (Pf)(Vf)

Question 9

Universal Gas Law

Answer 9

Po Vo/To= Pf Vf/ Tf

Question 10

Daltons law

Answer 10

Pt= P1+P2+P3….etc

Pn=(Pt) (%n)

Question 11

Henrys Gas Law

Answer 11

amount of gas that will dissolve is directly proportionate the pressure