Physics

Question 1

no forces of what exist between molecules

Answer 1

mutual attraction

Question 2

what do most gas law calculations need to take into consideration

Answer 2

water vapor - 47mmhg

Question 3

dry volume is ____ than saturated volume

Answer 3

less than

Question 4

pressure exerted by water is dependent only on what 2 things

Answer 4

temperature and relative humidity

Question 5

what does the addition of water always do to the partial pressure of other gases

Answer 5

lowers the partial pressure of the other gases present

Question 6

how is pressure defined

Answer 6

force exerted per unit area of surface

Question 7

conversion factor for 1atm to mmgh

Answer 7

1 atm = 760 mmhg

Question 8

conversion factor for 1 atm to cmhg

Answer 8

1 atm = 76 cmhg

Question 9

conversion factor for 1 atm to kpa

Answer 9

1 atm - 101.3 kpa

Question 10

conversion factor for 1 atm to torr

Answer 10

1 atm = 760 torr

Question 11

conversion factor for 1 atm to inches Hg

Answer 11

1 atm = 29.92 inches Hg

Question 12

when you compress a gas what happens to the mass

Answer 12

the mass remains unchanged

Question 13

when you compress a gas what happens to the volume

Answer 13

the volume decreases

Question 14

when you compress a gas what happens to the density

Answer 14

the density of the gas is greater

Question 15

what does a static liquid pressure depends solely on _____ and _______ of the fluid

Answer 15

depth & density

Question 16

what does the pressure exerted by a liquid in motion depend on

Answer 16

the nature of the flow itself

Question 17

if there is no flow what does the pressure measure

Answer 17

pressures are equal

Question 18

if there is a progressive decrease in pressure what is happening with flow

Answer 18

fluid is flowing

Question 19

what does a decrease in pressure reflect in terms of energy

Answer 19

reflects loss of energy

Question 20

what do frictional forces oppose

Answer 20

fluid flow

Question 21

where does frictional resistance to flow exist

Answer 21

within the fluid itself (viscosity) and b/w the fluid and tube wall

Question 22

how do u get more resistance with a fluid

Answer 22

smaller tube and greater viscosity

Question 23

in terms of fluid dynamics what type of flow is slower

Answer 23

laminer flow

Question 24

define laminar flow

Answer 24

fluid moving in discrete cylindrical layers or streamlines

Question 25

if a fluid is more streamline what does that mean in terms of motion

Answer 25

it is a constant forward motion

Question 26

in terms of fluid dynamics what type of flow is faster

Answer 26

turbulent flow

Question 27

define turbulent flow

Answer 27

loss of regular streamlines; fluid molecules form irregular eddy currents in a chaotic pattern

Question 28

what does resistance equal

Answer 28

the pressure difference divided by the flow

Question 29

how do you increase driving pressure with laminar flow

Answer 29

increase fluid viscosity, tube length, or increase the flow

Question 30

poiseuille's law

Answer 30

pressure will increase whenever the fluid viscosity, tube length, flow increases, or radius decreases

Question 31

what are factors in turbulent flow

Answer 31

fluid density, viscosity, linear velocity, and radius

Question 32

what is transitional flow

Answer 32

mixture of both laminar and turbulent flow

Question 33

how is flow measured

Answer 33

flow = L/sec

Question 34

how is velocity measure

Answer 34

velocity = distance per time cm/sec

Question 35

what is the same about flow and velocity

Answer 35

their concepts are the same

Question 36

law of continuity

Answer 36

velocity of fluid moving through a tube or a constant flow varies inversely with the available cross section area

Question 37

in terms of flow as the area decreases what happens to the speed

Answer 37

it increases

Question 38

what happens in the alveoli in terms of speed

Answer 38

even tho the alveoli airways are smaller, there is more surface area so speed is greatly reduced

Question 39

bernoulli effect

Answer 39

fluid passing through a tube that meets a constriction experiences a significant pressure drop and gains speed (example venturi mask)

Question 40

what happens when fluid that flows through the constriction

Answer 40

flow increases in velocity while the lateral wall pressure decreases

Question 41

define effusion

Answer 41

passing of gas molecules through a tiny opening in a container

Question 42

what is kinetic energy determined by

Answer 42

temperature of the gas

Question 43

what is the rate of diffusion inversely related to

Answer 43

square root of its molar mass

Question 44

what 4 things do you need to completely describe a gas

Answer 44

pressure, temperature, volume, number of particles

Question 45

particles in an ideal gas

Answer 45

dont attract or repel each other, and have an avg. kinetic energy that is directly related to kelvin temperature

Question 46

particles in a real gas

Answer 46

have their own volume and attract each other

Question 47

gas behavior is most ideal..

Answer 47

at low pressures at high temperatures in nonpolar atoms/molecules