Flashcards in force, gravity, and pressure ppt Deck (69)

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1

Q

what are the SI unit of measurement

A

m

kg

s

A

mol

cd.

kg

s

A

mol

cd.

2

Q

what are the Englinsh comparison to the SI units?

A

lb

oz

inch

foot

yard

F

oz

inch

foot

yard

F

3

Q

what are the metric system measurements

A

mL

kg

cm3

kg

cm3

4

Q

In physics what unit of measure is most freq used

A

SI

5

Q

whats the quanity and unit

m

m

A

length

meter

meter

6

Q

whats the quanity and unit

kg

kg

A

mass

kilogram

kilogram

7

Q

whats the quanity and unit

s

s

A

time

second

second

8

Q

whats the quanity and unit

A

A

A

electric current

ampere

ampere

9

Q

whats the quanity and unit

K

K

A

temp

kelvin

kelvin

10

Q

whats the quanity and unit

mol

mol

A

quanity of a substance

mole

mole

11

Q

whats the quanity and unit

cd

cd

A

luminosity

candle

candle

12

Q

what is quanity described by a single unit

A

scalar

13

Q

what are the characteristics of scalar

A

size/magnitude

mass

temp

length

mass

temp

length

14

Q

what deals with magnitude and direction

A

vector

15

Q

what are the characteristics of a vector

A

displacement

velocity

acceleration

force

velocity

acceleration

force

16

Q

force is a ______

A

vector

17

Q

what is a sum of all vectors on a given object?

A

force (net force)

18

Q

does zero net force constitute zero forces acting upon an object

A

no

19

Q

what law and who made it?

an object will remain at rest or in motion indefinitely unless a net force act upon it? (inertia)

an object will remain at rest or in motion indefinitely unless a net force act upon it? (inertia)

A

Newton's

law of motion #1

(inertia)

law of motion #1

(inertia)

20

Q

what law and who made it?

force is proportional to a specific mass and an acceleration in a specific direction

force is proportional to a specific mass and an acceleration in a specific direction

A

Newtons

law of motion #2

(force)

law of motion #2

(force)

21

Q

what law and who made it?

for each force exerted on one body, there is an equal, but oppositely directed force on some other body interacting with it

for each force exerted on one body, there is an equal, but oppositely directed force on some other body interacting with it

A

Newtons law

Law of motion #3

Law of motion #3

22

Q

how to remember the laws (just for me you may not like)

A

1st- you'll remain in motion unless something acts upon you

2nd- the force you are moving is proportional to your mass and acceleration

3rd- while going there is a constant force against you interacting with it

2nd- the force you are moving is proportional to your mass and acceleration

3rd- while going there is a constant force against you interacting with it

23

Q

explain force when a man is pushing a car!

A

- man applies 1 force to car

- man applies one force to ground (friction coeff)

-Car applies force to ground (friction Coeff)

-car applies force to man

- gravity applies force to car and man

-molecules in the air applying resistance

- man applies one force to ground (friction coeff)

-Car applies force to ground (friction Coeff)

-car applies force to man

- gravity applies force to car and man

-molecules in the air applying resistance

24

Q

what is the standard unit of measurement of force

A

newton

25

Q

equation for force?

A

force= mass x acceleration

26

Q

Equaion for newton

A

newton = kg x m / s^2

27

Q

what is a newton in layman's terms

A

the amount of force required to move one kg of an object one meter per second squared

28

Q

mr. miller is 116kg is that his weight?

A

no it's his mass

29

Q

what is the difference b/t pounds and kg

A

pounds are weight

kg is mass

kg is mass

30

Q

weight is a measure of what?

A

mass in accordence with its gravitational relationship

31

Q

any 2 particles with mass have what between them?

A

attractional force

32

Q

how do you find gravitational force?

A

Fg= G [(M1 x M2) / D2]

G=gravitational constant

M1 and M2= mass of 2 objects

D2= distance form central points of each object (squared)

G=gravitational constant

M1 and M2= mass of 2 objects

D2= distance form central points of each object (squared)

33

Q

what is the gravitational constant?

A

6.67 x 10^-11 N m^2 / kg^2

34

Q

what does little g mean

A

gravitational constant for earth

35

Q

what does g=

A

9.81 ms^2 (m/s/s)

or

32 ft s^2 (ft/s/s)

or

32 ft s^2 (ft/s/s)

36

Q

how do you calculate gravitational force (fw)

A

= g x m

fw = 9.81 ms^2 (m/s/s) or 32 ft s^2 (ft/s/s) x m

fw = 9.81 ms^2 (m/s/s) or 32 ft s^2 (ft/s/s) x m

37

Q

everything close to the earths surface will fall or accelerate at what rate

A

9.81 m/s^2

38

Q

every kg of an object has a gravitational force of what

A

9.81 m/s^2

39

Q

what is the free fall vacume? what are its properties

A

-weight is the only force acting on the object

-mass of the object does not effect the motion

-shape of the object does not effect the motion

-----All objects fall at the same rate in a vacuum (galileo)

-mass of the object does not effect the motion

-shape of the object does not effect the motion

-----All objects fall at the same rate in a vacuum (galileo)

40

Q

what is free fall in the atmosphere? what are the properties?

A

-weight is the only force acting on the object

- comparing 2 objects, the higher velocity occurs for hreater weight, lower drag coeff (more streamlined), lower gas density (higher altitude), or smaller area

---- objects do not fall at the same rate through the atmosphere----

velocity

gas density

frontal area

drag coeff

- comparing 2 objects, the higher velocity occurs for hreater weight, lower drag coeff (more streamlined), lower gas density (higher altitude), or smaller area

---- objects do not fall at the same rate through the atmosphere----

velocity

gas density

frontal area

drag coeff

41

Q

what are fractions of a newton

A

dynes

42

Q

forces are measured in newtons, biut when very small forces are being measured what is used?

A

dynes

43

Q

dynes are measured as (what is there equation)

A

dynes= gm x cm / s^2

44

Q

in healthcare what is measured as a dynes?

A

swans pvr and svr

45

Q

what is magnitude only?

A

scalar

46

Q

what is magnitude and direction

A

vector

47

Q

force and vector is measured in what?

A

newtons

48

Q

gravitational force allows for what?

A

weight measurements

49

Q

What is a measure of a given force dispersed over a specific area

A

pressure

50

Q

pressure is measured in what?

A

pascals

51

Q

pressure is inversly proportional to what?

A

area

52

Q

pressure is directly proportional to what?

A

force

53

Q

1 pascal is equal to what?

A

1 n/m^2

1 newton per meter squared

1 newton per meter squared

54

Q

when pascals is discussed with pressure

1 N/m^2 will equal what

1 N/m^2 will equal what

A

102 gms/m^2

55

Q

102 gms per square meter (gms/m^2) is a fairly small value so often times kilopascalse are used in the place of pascals!! so

1 N/m^2= 1 pascals so _______ N/m^2 = 1 kilopascal

1 N/m^2= 1 pascals so _______ N/m^2 = 1 kilopascal

A

1000 N/m^2

56

Q

100 KPa (kilopascals) equals?

Atm

BAR

mmHg

Torr

cmH2O

lb/in^2

Atm

BAR

mmHg

Torr

cmH2O

lb/in^2

A

Atm- 1

BAR- 1

mmHg- 760

Torr- 760

cmH2O-1020

lb/in^2- 14.7

(just remember 1 atm= 760mmHg= 760 torr= 14.7 lbs/in^2)

then memorize the other 2

BAR- 1

mmHg- 760

Torr- 760

cmH2O-1020

lb/in^2- 14.7

(just remember 1 atm= 760mmHg= 760 torr= 14.7 lbs/in^2)

then memorize the other 2

57

Q

what is a measure of the gravitational pull of the molecules and particles towards the center of the earth?

A

atm pressure

58

Q

what is teh standard measurement of atm pressure at sealevel?

A

1 atm

59

Q

Higher the elevation the _______ the atm pressure? and why?

A

lower

- fewer molecules at higher elevation

- further distance b/t 2 objects

- fewer molecules at higher elevation

- further distance b/t 2 objects

60

Q

the lower the elevation the _________ the atm pressure?

A

higher

like submerging into the water

like submerging into the water

61

Q

the presure in a fluid is transferable in an _________ system

A

enclosed

62

Q

an open fluid system has an _________

A

equilibrium

63

Q

an open fluid system had an equilibrium so when pressure is applied to this equilibrium the change in height of the fluid can be used to calculate the what?

A

pressure change ( bp)

64

Q

what is gauge pressure??

A

the pressure reading of a container of some kind, above and beyond atm pressure

65

Q

what is absolute pressure

A

the combination of atm pressure an dany pressure above atm pressure

66

Q

what in our practice uses gauge and absolute pressures?

A

APL valve

downstage regulator

pressure regulators

O2 fail safe

O2 flush valve

downstage regulator

pressure regulators

O2 fail safe

O2 flush valve

67

Q

equation for pressure?

A

pressure= force / area

68

Q

when force is constant and area increases what happens to pressure?

A

decreases

69

Q

how is the last 2 slides applied to anesthesia?

A

the smaller syringe you use the higher pressure u get!!!

and the bigger syringe the less pressure u get!!

and the bigger syringe the less pressure u get!!