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SRNAChem&Physics > Force and Pressure > Flashcards

Force and Pressure Flashcards

(72 cards)

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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
Unit of force for Newton
Kg* m/ Sec^2
26
Pressure formula
Force / A (area)
27
SI unit of pressure
Pascal
28
Pascal is
1 N / m^2
29
Other units of pressure
``` atm mmhg kPa Psi cmH2O ```
30
1 atm = ____mmhg
760
31
1 atm = 760 mmHg
1033.23cm H20
32
Manometer
Consider relationship between height and pressure by considering the weight exerted by the column of liquid
33
Hydrostatic pressure
pressure exerted by the liquid's weight.
34
Low pressure
molecure have more space.
35
Force is P
P = f/A
36
Doubling the diameter of the syringe
Decreases pressure
37
Smaller syringes generated significantly (more /less) _____injection pressure than larger
more
38
Absolute pressure
Atmospheric pressure + Gauge pressure
39
Bourdon gauge
Gauge pressure - atmospheric pressure.
40
Psi
14.5 psi per 1 atm per 760mmHg
41
Dalton's Law or partial pressure
Ptotal = P1+P2+ P3
42
At zero pressure the pressure in the cylinder is
Equal to atmosphere.
43
1 atm or 760mmHg = _____Pa | 1 atm or 760mmHg = ______KPa
101,325 Pa | 101.325 Kpa
44
Remember with kPa and Pa
convert from kilo pa to Pa.
45
One must push harder to get a larger object to move, is an EXAMPLES of the _____ law . Formula
2nd ; F = M x a
46
: If you push on an object, the object is pushing back | on you. Example of the ____ law
3rd
47
In Physics Mass is ________
the resistance of an object to acceleration.)
48
Speed is : ____ / ______
S = d/t
49
The Displacement = 0 because
returned to | exactly the same point from where it started.
50
Vectors are graphically represented with arrows, given | _______and _______
length and direction.
51
Devices used to measure pressure on gas cylinders
Aneroids | Bourdon tube
52
At zero pressure the pressure in the cylinder is equal to | __________
atmosphere
53
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
Dalton's Law
54
% Nitrogen
78.08
55
%Oxygen
21
56
Other gases in the air
Argon and Carbon dioxide
57
What is the partial pressure of oxygen
159 mmHg
58
What is the partial pressure of CO2
2 mmHg
59
Calculate the partial pressure of Nitrogen at SEA level? how ?
78% x 760 mmHg = 0.78 x 760 = 593 mmHg ( 79kPa)
60
Calculate the partial pressure of Oxygen at SEA level? how ?
21% x 760 mmHg = 0.21x760 = 191 mmHg ( ___kPa)
61
What is the difference between velocity and acceleration
Both velocity and acceleration have magnitude, unit and directions.
62
What is force
Vector quantity that describes a push or pull experienced by an object.
63
Does not require the presence of a liquid such as mercury to operate?
Aneroid Bellows Gauge
64
If Delta P is ________: the system has a higher pressure than _______ pressure. If Delta P is ________: the system has a higher pressure than _______ pressure.
positive; atmospheric | negative; atmospheric
65
_______use to measure pressure difference between the pressure exerted by the _______ in the cylinder and the ________ Pressure
Bourdon gauge: gas in the cylinder ; atmospheric pressure.
66
Pressure of a system relative to atmospheric pressure is
Gauge Pressure
67
Force per unit area exerted by the gas as gas molecules collider within the inner surface of the cylinder
Absolute pressure.
68
Sum of the gauge pressure and atmospheric pressure
Total (absolute) pressure.
69
Unit of weight is _____ because weight is a _______
Newton; Force.
70
The metric unit of pressure is defined as _____/_____ and is called the _______
N/m^2 | PASCAL
71
When is the total gas pressure inside a cylinder equal to zero?
When the cylinder is evacuated with a VACUUM PUMP.
72
Area of a circle is | Area of a square
``` A= Pi x r^2 A = s^2 ```

SRNAChem&Physics (13 decks)

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