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SRNAChem&Physics > Force and Pressure > Flashcards

Force and Pressure Flashcards

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1
Q

First law of newton

A

An object at rest or moving at constant speed straight line, will continue unless act upon with a force

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2
Q

2nd Law of Newton

A

Force is mass times accelaration

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3
Q

Third law of Newton

A

For every action, there is an equal and opposite reaction

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4
Q

Gravity is _______m/Sec^2

A

9.81 m/sec ^2

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5
Q

1 kg will exert force

1 lb will exert force

A
  1. 8 N

4. 45 N

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6
Q

1 N

A

1kg/ 9.8 o r 1000g/9.8

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7
Q

Mass

A

the amount of matter in an object

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8
Q

M =

A

F/a

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9
Q

Mass expressed in

A

Kg

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10
Q

Weight

A

Gravitational force exerted on an object by earth

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11
Q

Mass will remain constant on ______but ______ will change

A

moon; weight

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12
Q

Velocity definition

A

Different from speed

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13
Q

Velocity is

A

Displacement divided by time

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14
Q

V formula is

A

Delta r / Delta t

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15
Q

r is

A

displacement

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16
Q

Distance is

A

Linear

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17
Q

Displacement is directional is

A

positive, negative or Zero

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18
Q

A scalar quantities have ______ only : Examples of SCALAR MAHD

A

magnitude; Mass, age, Height, distance

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19
Q

Vector have both ______ and ______; Examples FTV

A

magnitude and direction: Velocity, Force, Torque

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20
Q

When 2 or more vectors are added, the sum is ___

A

Resultant Vector

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21
Q

The length of the arrow represent the

A

Magnitude

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22
Q

For vector, move head to _____

A

tail

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23
Q

Adding non parallel

A

May use Pythagorean theorem

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24
Q

Acceleration

A

describes how velocity changes with time.

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25
Q

Unit of force for Newton

A

Kg* m/ Sec^2

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26
Q

Pressure formula

A

Force / A (area)

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27
Q

SI unit of pressure

A

Pascal

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28
Q

Pascal is

A

1 N / m^2

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29
Q

Other units of pressure

A 
atm
mmhg
kPa
Psi
cmH2O
30
Q

1 atm = ____mmhg

A

760

31
Q

1 atm = 760 mmHg

A

1033.23cm H20

32
Q

Manometer

A

Consider relationship between height and pressure by considering the weight exerted by the column of liquid

33
Q

Hydrostatic pressure

A

pressure exerted by the liquid’s weight.

34
Q

Low pressure

A

molecure have more space.

35
Q

Force is P

A

P = f/A

36
Q

Doubling the diameter of the syringe

A

Decreases pressure

37
Q

Smaller syringes generated significantly (more /less) _____injection pressure than larger

A

more

38
Q

Absolute pressure

A

Atmospheric pressure + Gauge pressure

39
Q

Bourdon gauge

A

Gauge pressure - atmospheric pressure.

40
Q

Psi

A

14.5 psi per 1 atm per 760mmHg

41
Q

Dalton’s Law or partial pressure

A

Ptotal = P1+P2+ P3

42
Q

At zero pressure the pressure in the cylinder is

A

Equal to atmosphere.

43
Q

1 atm or 760mmHg = _____Pa

1 atm or 760mmHg = ______KPa

A

101,325 Pa

101.325 Kpa

44
Q

Remember with kPa and Pa

A

convert from kilo pa to Pa.

45
Q

One must push harder to get a larger object to move, is an EXAMPLES of the _____ law . Formula

A

2nd ; F = M x a

46
Q

: If you push on an object, the object is pushing back

on you. Example of the ____ law

A

3rd

47
Q

In Physics Mass is ________

A

the resistance of an object to acceleration.)

48
Q

Speed is : ____ / ______

A

S = d/t

49
Q

The Displacement = 0 because

A

returned to

exactly the same point from where it started.

50
Q

Vectors are graphically represented with arrows, given

_______and _______

A

length and direction.

51
Q

Devices used to measure pressure on gas cylinders

A

Aneroids

Bourdon tube

52
Q

At zero pressure the pressure in the cylinder is equal to

__________

A

atmosphere

53
Q

The total pressure exerted by a gaseous mixture is equal
to the sum of the partial pressures of each individual
component: P1 + P2 + P3 + ….. = Ptotal is the

A

Dalton’s Law

54
Q

% Nitrogen

A

78.08

55
Q

%Oxygen

A

21

56
Q

Other gases in the air

A

Argon and Carbon dioxide

57
Q

What is the partial pressure of oxygen

A

159 mmHg

58
Q

What is the partial pressure of CO2

A

2 mmHg

59
Q

Calculate the partial pressure of Nitrogen at SEA level? how ?

A

78% x 760 mmHg = 0.78 x 760 = 593 mmHg ( 79kPa)

60
Q

Calculate the partial pressure of Oxygen at SEA level? how ?

A

21% x 760 mmHg = 0.21x760 = 191 mmHg ( ___kPa)

61
Q

What is the difference between velocity and acceleration

A

Both velocity and acceleration have magnitude, unit and directions.

62
Q

What is force

A

Vector quantity that describes a push or pull experienced by an object.

63
Q

Does not require the presence of a liquid such as mercury to operate?

A

Aneroid Bellows Gauge

64
Q

If Delta P is ________: the system has a higher pressure than _______ pressure.
If Delta P is ________: the system has a higher pressure than _______ pressure.

A

positive; atmospheric

negative; atmospheric

65
Q

_______use to measure pressure difference between the pressure exerted by the _______ in the cylinder and the ________ Pressure

A

Bourdon gauge: gas in the cylinder ; atmospheric pressure.

66
Q

Pressure of a system relative to atmospheric pressure is

A

Gauge Pressure

67
Q

Force per unit area exerted by the gas as gas molecules collider within the inner surface of the cylinder

A

Absolute pressure.

68
Q

Sum of the gauge pressure and atmospheric pressure

A

Total (absolute) pressure.

69
Q

Unit of weight is _____ because weight is a _______

A

Newton; Force.

70
Q

The metric unit of pressure is defined as _____/_____ and is called the _______

A

N/m^2

PASCAL

71
Q

When is the total gas pressure inside a cylinder equal to zero?

A

When the cylinder is evacuated with a VACUUM PUMP.

72
Q

Area of a circle is

Area of a square

A 
A= Pi x r^2
A = s^2

SRNAChem&Physics (13 decks)

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