General Physics

Question 1

What two gas laws makeup the Ideal Gas Law?

Answer 1

Charles’ and Boyle’s

Question 2

What are the 5 gas laws?

Answer 2

Charles’, Dalton’s, Henry’s, Boyle’s, and Ideal Gas

Question 3

Pressure

Answer 3

a force acting on a unit of area; P = F/A

Question 4

Atmospheric Pressure

Answer 4

pressure exerted by the weight of the atmosphere (varies by altitude)

Question 5

Hydrostatic Pressure

Answer 5

he force of a column of water acting upon a body immersed in the water, equal in all directions at a specific depth. Increases by 1 atmosphere or 1 bar for every 10m of seawater

Question 6

Absolute Pressure

Answer 6

the sum of all pressures acting on an object

Question 7

Gauge Pressure

Answer 7

the difference between absolute and atmospheric pressure

Question 8

Absolute Pressure formula

Answer 8

Absolute Pressure (bar) = (Depth (m) / 10) + 1

Question 9

Archimedes Principle

Answer 9

Any object, wholly or partly immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.

Question 10

Archimedes Principle formula

Answer 10

m (kg) = p (kg/l) x V (l)

Question 11

Conduction

Answer 11

transmission of heat by direct contact

Question 12

Convection

Answer 12

the transfer of heat by the movement of heated fluids.

Question 13

Radiation

Answer 13

heat transmission by electromagnetic waves of energy

Question 14

For divers what is the most significant way of transmitting heat?

Answer 14

Conduction

Question 15

Factors affecting conduction

Answer 15

1. difference in temperature between material

2. thermal conductivity of the materials

Question 16

A diver’s visual perception changes with regards to?

Answer 16

distance. shape, size and color

Question 17

Factors that contribute to the change in a diver’s visual perception?

Answer 17

refraction, turbidity, salinity, and pollution

Question 18

Underwater objects appear …

Answer 18

1/3 larger and 1/4 closer

Question 19

Refraction

Answer 19

the change in direction of a wave due to a change in its transmission medium; light bends passing from air to water, water is more dense, therefore light slows in speed

Question 20

The more turbid the water is …

Answer 20

the shorter the distance to an object appears to be

Question 21

Color absorption

Answer 21

Red 5m, Orange 15m, Yellow 30m, Green 75, Violet 30m

Question 22

Sound underwater

Answer 22

travels 4.33 times faster then in air; travels over longer distances

Question 23

Air is comprised of what 2 gases and in what percentages

Answer 23

O2 21% and N 79%

Question 24

Nitrox

Answer 24

any mixture of O2 and N that contains 1 to 99% oxygen.

Question 25

Enriched air oxygen …

Answer 25

is a nitrox mix that has O2 at 22-99%