Physics- Gravity, Force & Pressure

Front 1

In international system of units (SI)

Back 1

uses metric system
g, kg, m, sec, K (Temp)

Front 2

____ is the amount of material or matter contained in an object (electrons, protons and neutrons)

Back 2

mass

Front 3

Weight =

Back 3

mass x gravity


mass does not equal weight! (You will have to same mass in space but a much lighter weight)

Front 4

force is measured in

Back 4

newtons, N

Front 5

Pressure is measured in

Back 5

pascals, Pa

Front 6

Dyne

Back 6

basic measurement of force when measuring in small quantities
force required to move a 1 kg object 1 cm in 1 sec

Front 7

Newton

Back 7

the unit of force required to move 1 kg 1 meter in 1 sec
1kg m/s^2

Front 8

Force =

Back 8

mass x acceleration

Front 9

The larger the force, the greater the ______.

Back 9

acceleration

Front 10

Motion takes into consideration what 3 factors

Back 10

speed, velocity, accelleration

Front 11

Density =

Back 11

weight/volume (grams/cm cubed, grams/L)

Front 12

Volume =

Back 12

L x W x H

Front 13

How does specific gravity relate to IA use?

Back 13

tells us whether a gas is heavier than air, and thus can be used for gas inductions by flowing over a pts face because if gas is heavier than air it will pull downward

Front 14

Tool used to measure specific gravity of a fluid

Back 14

hydrometer

Front 15

Pressure

Back 15

force applied over a surface area
P= f/a

Front 16

Pascal (standard unit of pressure) =

Back 16

1 newton/1 square meter

*often described in kilopascals -- 1000 newtons/1 sq meter*

Front 17

Pressure is (inversely/directly) proportional to area.

Back 17

inversely

Front 18

Which exerts greater pressure? a 2 cc syringe or a 20 cc syringe?

Back 18

greater pressure w 2 cc syringe

Front 19

Which syringe would be easier to push a drug into an epidural through? 3 mL or 10 mL?

Back 19

3 mL

Front 20

1 BAR =

Back 20

100 kilopascals = 1 atm = 760 mmHg

Front 21

What is the pressure necessary to support a column of mercury 1 mm in height?

Back 21

1 atm, 760 mmHg

Front 22

Gravitational pull on air molecules gives rise to _____ pressure.

Back 22

atmospheric
*less pressure at top of Mt. Everest because less molecules being pulled onto you*

Front 23

Tool used to measure atmospheric pressure

Back 23

barometer - tube closed at one end and open at the other, filled w mercury (or other high density liquid) and inverted into a large reservoir open to atmosphere -- presure of atm pushes down on surface of mercury reservoir and as air pressure incr it pushes the mercury higher into the column

Front 24

This pressure measurement tool measures pressure differences with a u-shaped tube filled with fluid of a known density such as mercury. One end is connected to the system whose pressure you want to measure and other end is open to atmosphere, difference calculated between height distance

Back 24

manometer
ex: CVP

Front 25

Aneroid bellows gauge does not require the presence of a _____ To operate, and relies on the expansion and contraction of bellows as the ____ Changes, better used when measuring gases.

Back 25

liquid, pressure
*denser the object, less expansion on bellows*

Front 26

If an aneroid bellows gauge is sealed w respect to the atmosphere, it will measure _____. If it is open to the atmosphere it will measure the pressure on the gauge exerted by the substance in relation to ________.

Back 26

absolute pressure,
atmospheric pressure

Front 27

atmospheric pressure + gauge pressure =

Back 27

absolute pressure

Front 28

Atmospheric pressure is lower at _____ altitude and higher at ______ altitude.

Back 28

low at high
high at low

Front 29

Resistance =

Back 29

pressure drop / flow

pressure drop along a tube results in fluid flow

Front 30

The _____ of an IV tube has the least amt of resistance and greatest most laminar flow.

Back 30

center

Front 31

This gauge is used on gas cylinders and is a type of aneroid gauge. It measures the differences between the pressure exerted by the gas in a cylinder and the atmospheric pressure, accomplished by using a coiled tube mechanically coupled to a pointer

Back 31

bourdon gauge

Front 32

How does a bourdon gauge work?

Back 32

as a gas at a pressure above atm pressure enters the coiled tube, it causes the coil to slightly uncoil, thereby causing the pointer to move over a numerical scale indicated the gauge pressure in the tank

Front 33

Manometers use increasing pressure to increase the height of ____.

Back 33

liquid

Front 34

Gravity pulls down a liquid related to its ______.

Back 34

density

more molecules to pull on with greater density

Front 35

The level of fluid equalization in a curved tube (thorpe tube) will equal _____ pressure.

Back 35

atmospheric

Front 36

A full cylinder of O2 has a gauge pressure of _____ psi. An empty cylinder will still contain O2 exerting pressure equal to atmospheric, so even though the gauge reads 0, the actual pressure is still ____.

Back 36

2200 psi, 760 mmHg

Front 37

What is the absolute pressure for a full tank of O2?

Back 37

2200 + 760 = 2960
(gauge pressure+atmospheric pressure)

Front 38

The measurement of blood pressure is ____ pressure + _____ pressure.

Back 38

sphygmomanometer, atmospheric

Front 39

the natural force of attraction exerted by a celestial body, such as earth, upon objects at or near its surface tending to draw them towards the center of the earth is know as?

Back 39

physics

Front 40

the natural force of attraction between any two massive bodies, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them is know as?

Back 40

physics

Front 41

specific gravity expresses the ratio between the ____ of 2 substances. The substance is usually compared to the density of ____ or for gases, the density of _____.

Back 41

densities, water, air

Front 42

What is the formula for specific gravity?

Back 42

specific gravity=
density of a substance/density of water(air)

density of water/air=1

Front 43

all ___ on earth is influenced by gravity therefore, ____ is simply the gravitational force exerted on an object by a much larger object (ie the earth)

Back 43

weight, weight

Front 44

when measuring weight, the magnitude of the weight is measured in newtons. the mass is measures in kilograms. the gravity will be measures using the standardized formula of ___?

Back 44

m/s^2