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M2 > 2.2 (25Q) > Flashcards

2.2 (25Q) Flashcards

1
Q

What is newtons 1St law?

A

States a body will remain at rest continue to move in a uniform velocity unless acted upon by a force

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2
Q

What is the metric and imperial system in newtons 1st law?

A

Metric - force -newtons
Imperial - force - pounds

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3
Q

In newtons 1st law what will happen when a resultant force is acted upon on a body?

A

It will begin to move

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4
Q

In. newton’s 1st law what will happen when a body is moving and a force acs on it?

A

It may alter is speed or direction motion or bring it to rest

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5
Q

What quantity is force?

A

Vector

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6
Q

What is a moment?

A

A turning effect produced by a force acting at a distance in respect from the objects fulcrum

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7
Q

What is the equation for force?

A

F = M*A

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8
Q

What is moment used for?

A

Static applications

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9
Q

What is the metric and imperial measurements for moments?

A

Metric - moment - Nm
Imperial - moment - li-in

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10
Q

What is an opposing moment?

A

Total moments that act against each other are applied at points separately by a distance

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11
Q

What is an opposing moment?

A

Total moments that act against each other are applied at points separately by a distance

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12
Q

In opposing moments what is the lever?

A

It is a ridged bar capable of turning about a fixed axis called a fulcrum

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13
Q

What is fulcrum and what forces does it have?

A

Fulcrum is C
Has force F1 and F2 acting downwards

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14
Q

Forces are what from the fulcrum?

A

Perpendicular distance from the fulcrum and apply two moments clockwise and anti clockwise

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15
Q

What is the equation for opposing moments?

A

M1 = F1 * s1

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16
Q

What is M1, F1, S1, M2, F2, S2?

A

M1 = total anti clockwise moment
F1 = force left on left hand side of the fulcrum
S1 = perpendicular distance from the fulcrum
M2 = total clockwise moment
F2 = force on the right hand side of the fulcrum
S2 = perpendicular to the fulcrum

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17
Q

What is a couple?

A

A pair of forces that are equal in magnitude and opposing direction

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18
Q

In couples where is the force applied?

A

Applied at points separated by distance perpendicular to the forces

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19
Q

In a couple what does the combined moment of the forces produce?

A

Torque on the object they act on

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20
Q

What is the equation for couples?

A

T = F * S
T = F * R * 2

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21
Q

What does T, F, S, R, ?

A

T = torque
F = one of the forces
S = distance between the the forces
R = radius
2. When the force is a couple

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22
Q

What is the resultant?

A

When two or more vectors acting on an object is known as the resultant

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23
Q

Two vectors are the components of what?

A

The results if forces are in the same direction then add them together

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24
Q

How do you find the resultant of 2 vectors?

A

Vectors that act in opposite directions along the same line

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25
Q

How do you calculate the resultant if they are on the same line.

A

Take the bigger number away from the smaller number

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26
Q

What is the Pythagoras theorem?

A

The hypotenuse is the resultant and equals the length and magnitude of the resultant

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27
Q

In Pythagoras theorem what does the angle between the resultant and vector indicates what?

A

Direction of the resultant

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28
Q

If the angle is between 90 degrease what can the resultant be calculated using?

A

Calculated using Pythagoras theorem

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29
Q

What is the equation for Pythagoras theorem?

A

A2^2+ B^2 = C^2

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30
Q

What is the parallelgram msthod?

A

The angle indicates the direction of the resultant

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31
Q

Scalar is what?

A

Have magnitude with no direction

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32
Q

What is vector?

A

Have magnitude and direction

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33
Q

Can scaler quantities undergo a change in direction?

A

Yes

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34
Q

Vectors act in what?

A

In a straight line

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35
Q

How vectors represented?

A

In diagrams with arrows that point in the direction of the force

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36
Q

What does the arrows length identify?

A

Measure the magnitude of a vector quantity

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37
Q

What is the CG of an object?

A

The imaginary point through which all the weight of an object is set to act

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38
Q

The CG is the average location of what?

A

The total of weight and therefore the balance point of an aircraft

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39
Q

Position of the CG is a given from what?

A

A given distance from the aircraft datum

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40
Q

Once datum has been selected what is taken from there?

A

All moment arms and location of CG range

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41
Q

Stress describes what?

A

Magnitude of force that causes deformation

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42
Q

Deformation is also known as what?

A

Strain

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43
Q

Stress is accompanied by what?

A

Strain

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44
Q

What is the metric and imperial measurements for stress?

A

Metric -pascal or N/M ^2
Imperial - PSI

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45
Q

Every part of the fuselage must carry what?

A

Must carry a load

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46
Q

Every part of the fuselage must carry what?

A

Must carry a load

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47
Q

What is the equation for stress?

A

A(stress) =F (force) / A(area)

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48
Q

What are the 5 basic structural forces on an aircraft?

A

Tension
Compression
Shear
Bending
Torsion
Tension

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49
Q

What does strain describe?

A

Deformation of a material due to stress

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50
Q

What is the equation for strain?

A

E (strain) = change in length / original length of the materiel

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51
Q

What is elasticity?

A

The ability of a material to return to its original shape one external forces have been removed

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52
Q

In elasticity why can internal forces be stretched but not broken?

A

They have internal atoms binding forces
They act like springs

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53
Q

What is plasticity?

A

Ability of a material to change shape permanently when subjected to stress

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54
Q

In placidity does the material return to its original shape once the force has been removed?

A

No remains deformed

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55
Q

What is tension?

A

The stress being applied which tends to increase the length of a body

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56
Q

What is tension or tensile strength also known as?

A

Axial or normal stress

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57
Q

As tension increases what will also increase?

A

Deformation will increase

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58
Q

What is hokes law?

A

The extension of an elastic object is directly proportional to the force applied to it

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59
Q

What is the equation for homes law?

A

F (force) = k (spring constant) * e (extension)

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60
Q

The equation works as long as what?

A

As long as the elastic limit is not extended

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61
Q

If an object is stretched to fan in hooked law what will happen?

A

It will not return to its origami oak shape when the load is removed

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62
Q

When an object meets the elastic limit what region does it enter?

A

Enters the plastic region
For and deformation and no proportional but increase in force give large deformation

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63
Q

In the plastic region what happens be for the rod breaks?

A

Diameter be What is tension or tensile strength also known as?comes smaller
Rod is about to fail
Rod fails

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64
Q

The elasticity of an object depends on what?

A

Shape
Size
Structure

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65
Q

What is young’s modal?

A

A way of measuring the elasticity of solids to compare different materials

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66
Q

What is compression?

A

Is the force applied which tends to shorten or squeeze a body

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67
Q

What is the compressive strength of a measured in?

A

N/m^2

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68
Q

What is shear?

A

Shear tries to slice a body apart sliding one layer over another

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69
Q

In an aircraft control system what is designed to withstand shear loads?

A

Clovis bolt

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70
Q

What is bending?

A

Force that tries to bend the aircraft’s wing upwards

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71
Q

What is torsion?

A

A twisting force

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72
Q

What happens when a an object is subjected to torsional stress?

A

Tension stress opperated diagonally across the object

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73
Q

Compression stress acts at what angle to tension stress?

A

Acts at a right angle

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74
Q

What is hardness?

A

Tendency to resist indentation or penetration

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75
Q

Hardness does not make a matirial resistant to what?

A

Resistant to fracture

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76
Q

What is strength?

A

Tendency to withstand an applied load without failure or plastic deformation

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77
Q

What is roughness?

A

Ten dances to resist breakage when deforming or when impact forces are applied to the matirial

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78
Q

What is brittleness?

A

The tendency to break without change of shape

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79
Q

When do more materials become brittle?

A

When they are cooled

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80
Q

What is elasticity?

A

Tendency to return to the original shape when the distorting force is removed

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81
Q

What is placidity?

A

The tendency to remain in the new shape when distorting force is removed

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82
Q

Can some hard substances can be plastic?

A

Yes but need much more force to change there shape

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83
Q

What is malleability?

A

The Brendan ey to undergo compressive stresses without damage

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84
Q

What is ductility?

A

Tendency to undergo tensile stress without damage

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85
Q

A fluid is a substance that does want?

A

Flows

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86
Q

What is a vapour?

A

Is a gas that can be liquified by an increase in pressure without decreasing its temperature

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87
Q

What is a volatile liquid?

A

A liquid which eisly evaporates

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88
Q

What is flammable and inflammable?

A

A material that will catch fire readily and vapours are usually highly flammable

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89
Q

What is flash point?

A

The temp at which it will catch fire when exposed

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90
Q

What is toxicity?

A

Refers to how poisonous it is

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91
Q

How are highly toxic materials identified?

A

By warning notices on there container

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92
Q

How are highly toxic materials identified?

A

By warning notices on there container

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93
Q

What is an inert substance?

A

A substance that will not chemically combine with another substance

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94
Q

All inert substances are at what presure and temperature?

A

At normal pressures and temperatures

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95
Q

When a force is spread out over an area it is said to exert what?

A

Pressure on the area

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96
Q

What is the metric and imperial system from pressure?

A

Metric - pressure - N/M^2 or Pa
Imperial - pressure - psi

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97
Q

What is the equation for pressure?

A

P (pressure) = F (force) / A (area)

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98
Q

What is 1 atom in pascals, psi, millibars?

A

Pascals - 101325 Pa
PSI | 1.7 lb/in
Millibars - 1013.25 mb

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99
Q

What is atmospheric presure measured with?

A

A mercury barometer

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100
Q

What is a mercury barometer?

A

A glass turbo closed st the top sitting in an open mercury filled basin at the bottom

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101
Q

What does the weight of the mercury creates?

A

Vacuumein the top of the tube known as a Torricellian vacuumed

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102
Q

What happens to the mercury vacuums with a change in atmospheric presure?

A

It will cause the mercury to rise or fall so height of the mercury in the column is proportional to atmospheric pressure

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103
Q

What happens to the mercury vacuums with a change in atmospheric presure?

A

It will cause the mercury to rise or fall so height of the mercury in the column is proportional to atmospheric pressure

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104
Q

What is gauge pressure?

A

Amount of pressure which is measured pressure in a fluid execs that of the atmosphere

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105
Q

What does ambient pressure refer to?

A

Presure in the area immediately surrounding an object

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106
Q

What is absolute pressure?

A

The process of having nothing inside a space
(A perfect vacuum)

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107
Q

What is the equation for absolute pressure?

A

P abs (absolute presure) = P g (gauge pressure) + P atm ( atmospheric pressure)

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108
Q

When the atmospheric pressure is 15 lb/in ^2 what is the absolute pressure and gauge presure for a perfect vacuum, outside air, cabin pressure on ground?

A

Perfect vacuum - absolute 0 - gauge -15
Outside Air - absolute 15 - gauge
Cabin pressure on ground - absolute 21 - gauge 6

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109
Q

What does Archimedean printable state?

A

A body in a a fluid will be subjected to an upward force equal to the weight of the fluid it displaces

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110
Q

What is the boy ant force equal to?

A

The weight of the fluid displaced

111
Q

What is the equation for buoyancy’?

A

B (buoyant force) = W fluid (weight of the fluid displaced)

112
Q

What will decide if an object will float?

A

By the density of the body and the fluid

113
Q

What will decide if an object will float?

A

By the density of the body and the fluid

114
Q

What is the ratio for buoyancy?

A

= P1 / P2

P1 =density of the body
P2 = density of the fluid

115
Q

What is motion?

A

Continuing change of position or the process which a body undergoes displacement

116
Q

Describe motion and uniform?

A

Motion - in different points in space at different times
Uniform - remains in the same point for a given period of time

117
Q

Describe constant velocity?

A

When a body is moving in a straight line with a constant speed it is not acselerating so has constant velocity

118
Q

What does S U V A T H G stand for?

A

S - displacement (m)
U - initial velocity (M/s)
V - final velocity (M/s)
A - acsellaration (m/s^2)
T - time (s)
H - height (M)
G - gravitational acselaration (M/s^2)

119
Q

Can acselaration remain constant?

A

There is no special case where it remains constant

120
Q

What does uniform circular motion describe?

A

An object travailing at a constant speed in a circular path a distance from the centre of rotation

121
Q

In centripetal force the speed of the object remains the constant but what is constant ally changing?

A

Velocity is constant ally. Hanging because of the constant change of direction

122
Q

The constant ally changing velocity means what?

A

There is constant acselaration

123
Q

Centrifugal force will be perpendicular to what?

A

The direction of travel

124
Q

What does Newton’s first law tell us about a satalite?

A

The satellite would naturally follow a straight path and the force must be applied for it to deviate from a straight path

125
Q

Centripetal force is what force?

A

The force that is necessary to keep an object moving in a curved path and is directed towards the centre around the mass rotates

126
Q

What is centripetal acceleration?

A

A constant speed in the direction of the motion

127
Q

What way does centripetal force pull?

A

In words

128
Q

Centrifugal force is a fictitious force that appears to do what?

A

Act on an object moving in a curved path when viewed from the same point of reference

129
Q

What does inertia do in centrifugal force?

A

Makes an object moving in a curved path it gives it a tendency to continue moving in a straight line

130
Q

What is a pendulum?

A

A weight suspended in the earths gravitational field which is free to pivot

131
Q

What does a pendular motion describe?

A

The movement which the pendulum will undergo if it’s given a small displacement from its vertical position

132
Q

What is angular displacement?

A

Angular displacement from rest to max swing position

133
Q

What is oscillation/vibration?

A

One complete swing to and from maximum position

134
Q

What is length of pendulum?

A

Distance from the pivot to the centre of gravity to the bob

135
Q

What is a cycle?

A

The motion completed in one period

136
Q

What is a cycle?

A

The motion completed in one period

137
Q

What is frequency?

A

Number of cycles completed unit time

138
Q

What do observations in pendular movements show?

A

That the pendulum has only displaced a few degrease
The periodic time remains constant even as the movement slows down
Mass of the bob makes no difference to periodic time

139
Q

What is the relationship between length and periodic time?

A

The square of the periodic time is proportional to the length of the pendulum

140
Q

The period of a pendulum increases when what happens?

A

When there is an increase in pendulum length or decrease in gravity

141
Q

What is damping?

A

Is a decrease of vibrations as a result or removing energy through resistance to motion reducing the amplitude of the oscillation

142
Q

What does vibration refer to?

A

Mechanical oscillations about an equilibrium point

143
Q

Why will vibrations be desirable?

A

Because instances of vibration are necessary for the correct function of various devices

144
Q

Why will vibrations be desirable?

A

Because instances of vibration are necessary for the correct function of various devices

145
Q

Why are some vibrations undesirable?

A

They can cause imbalances in rotating parts

146
Q

Sound and vibration are closely related in what?

A

Science of acoustics

147
Q

What is free vibration?

A

When a mechanical system is set off with an initial input and then allowed to vibrate freely

148
Q

What is forced vibration?

A

Occurs when a continuous force or motion is applied to a mechanical system

149
Q

What is forced vibration?

A

Occurs when a continuous force or motion is applied to a mechanical system

150
Q

In forced vibration the frequency of the vibration is dependant on what?

A

The frequancey of the force or motion applied
Amplitude vibration is strongly dependant on the behaviour of the mechanical system

151
Q

What are harmonics?

A

Periodic vibrations

152
Q

The motion of harmonics is periodic explain why?

A

The periodic motion repeats itself at standard intervals in a specific manner being sinusoidal with a constant amplitude

153
Q

A simple frequancey travelling will take what shape?

A

Take form of a sin wave

154
Q

If the periodic motion is the form of a travelling wave what quantities have to be taken in to account?

A

Velocity of propagation and wavelength

155
Q

Harmonics are waves with a frequency that is what?

A

Positive integer multiple of the fundamental frequancey

156
Q

Harmonics are waves with a frequency that is what?

A

Positive integer multiple of the fundamental frequancey

157
Q

What is the fundamental frequency?

A

The first harmonic of the harmonic series

158
Q

What is resonance?

A

The tendency of a system to oscillate at a maximum altitude at a cirtian frequency

159
Q

What does 1Hz equal?

A

1 cycle per second

160
Q

Resonance is important where?

A

Mechanical and electrics

161
Q

What is the velocity ratio?

A

How far the effort has to move in relation to the load

162
Q

If a machine has a velocity ratio grater than 1 the distance is moved by what?

A

Distance moved by the point of effort is grater than the distance moved by the load

163
Q

What is mechanical advantage?

A

The ratio of the force produced by a machine to the force applied to it

164
Q

What is the actual mechanical advantage?

A

The ratio of the output force and the input force
Actual mechanical advantage tells us how much easier the work can be done

165
Q

What is the ideal mechanical advantage?

A

The mechanical advantage that would exist if there was no friction in the machine

166
Q

What is a lever?

A

A ridged bar capable of turning about the fulcrum

167
Q

What are the types of levers?

A

First class levers
Second class levers
Third class levers

168
Q

In a first class lever where is the fulcrum?

A

Located between the the effort and resistance
The difference can be varied to suit the need

169
Q

In a first class lever when an effort is applied it acts in what direction.

A

In the opposite direction to the resistance

170
Q

Where is the fulcrum on a sec on class lever?

A

Fulcrum is at the end of the lever and the effort is applied at the opposite end

171
Q

Where is the fulcrum on a sec on class lever?

A

Fulcrum is at the end of the lever and the effort is applied at the opposite end

172
Q

What is the most common second class lever?

A

The wheelbarrow

173
Q

When would a third class lever be used?

A

When the load is to be moved further than the load

174
Q

Where is the force applied on a third class lever?

A

Between the fulcrum and the resistant load

175
Q

What is an incline plane?

A

Plane surface incline to a horizontal plane at any angle but a right angle

176
Q

What is a pulley?

A

It is a wheel or a set of wheels which has a rope or chain attached to lift or lower heavy objects

177
Q

What is the mechanical advantage of a fixed pulley?

A

1

178
Q

If a single pulley is not fixed what will its mechanical advantage be?

A

2

179
Q

What is a common way to determine the mechanical advantage?

A

Count the number of ropes that move or support a movable pulley

180
Q

A mechanical advantage of a pulley system is gained how?

A

The distance on which the effort is applied increase

181
Q

What is a block and tackle?

A

A pulley system made up of a fixed and movable pulley with a rope or cable threaded between them
Has a mechanical advantage of 3

182
Q

What do you do to gain a mechanical advantage on gears?

A

The number of teeth on the drive or the driven gear is varied

183
Q

When will they be no mechanical advantage in gears?

A

When the drive and the driven gear have the same ammount of teeth

184
Q

What is the equation for mechanical advantage?

A

MA = driven gear / drive gear

185
Q

Torque is proportional to and inversely proportional to what?

A

Proportional to horsepower
Inversely proportionately to rotational speed (RPM)

186
Q

What is the equation for horsepower?

A

Horsepower = torque * rpm / 5252

187
Q

What must happen if torque increases or decreases?

A

If torque increases RPM must decrease
If torque decreases RPM must increase

188
Q

What are spur gears?

A

Teeth cut straight across there circumference and used to connect parallel shafts

189
Q

If both shafts turn in the same direction what is needed?

A

One gear must have internal teeth

190
Q

What is a bevel gear?

A

Teeth cut in to a conical surface known as the pitch zone
Two gears mesh together to transmit power between two shafts

191
Q

What is a worm gear?

A

A gear consisting of a toothed wheel wired by a short revolving cylinder

192
Q

What are sun and planetary gears?

A

The input drive is on the sun gear
Planets held together by a cage driven around by the sun gear
Used when weight and apace are an issue

193
Q

What is efficiency?

A

The ratio of work which is transferred to a useful form compèred to the total input work
It is measure in percentage
No machine can be 100% efficancey due to heat

194
Q

What does Newton’s first law state?

A

Every object remains in a state of rest or in uniform motion in a straight line unless it is made to change that state by external forces impressed on it

195
Q

Newton’s first law is also called what?

A

The law of inertia

196
Q

What does Newton’s second law describe?

A

Acceleration of an object produced by a force is directly proportional to the force in the same direction as the force and is inversely proportional to the mass of an object

197
Q

What does Newton’s second law state?

A

Force =mass * acselaration

198
Q

What is newtons 3rd law

A

Every action has an equal and opposite reaction

199
Q

What is mass?

A

Amount of matter in a body

200
Q

What is mass?

A

Amount of matter in a body

201
Q

What is force?

A

Force is an interaction that changes a body’s state of rest or uniform motion in a straight line

202
Q

What is inertia?

A

Property of matter that cause interaction any change to its motion

203
Q

Inirtia of a body depends on what?

A

On mass
The grater the mass the grater the inertia

204
Q

Inirtia of a body depends on what?

A

On mass
The grater the mass the grater the inertia

205
Q

What is work?

A

Is force causing a movement or displacement of a i jest

206
Q

What is power?

A

Measure of the rate at which work is done or when energy is converted

207
Q

What is energy?

A

Capacity to do work

208
Q

What is energy?

A

Capacity to do work

209
Q

What is potential and kinetic energy?

A

Potential energy - energy a body has due to its position or condition
Kinetic energy - work needed to acselaration a body of mass from rest to velocity

210
Q

What is total energy?

A

The sum of all different forms of energy in a system

211
Q

What is chemical energy?

A

The energy which is stored in chemical bonds between atoms
The energy can be realised or consumed
When bonds are broken new bonds are formed

212
Q

What is heat energy?

A

Energy which a body possesses
Also called internal energy
Can be transferred between bodies

213
Q

What is efficiency?

A

Defined as the ratio of useful work done by the machine

214
Q

What is the impulse?

A

Impulse of a force changes the momentum of a body and is equal to the force multiplied by the time it acts on the body

215
Q

What amounting is a vector?

A

Vector

216
Q

What is a gyroscope?

A

An instrument that contains a disc rotating at a axis at high speeds

217
Q

What is rigidity?

A

Application of newtons 1st law
Ability of a spinning rotor to retain its axis in a fixed direction in space unless acted upon by an external force

218
Q

What is rigidity?

A

Application of newtons 1st law
Ability of a spinning rotor to retain its axis in a fixed direction in space unless acted upon by an external force

219
Q

The redigity of a spinning rotor is affected by what factors?

A

Rotor mass
Effective radius at inch the mass acts
Speed of rotation
Bering friction

220
Q

What is prosession?

A

If an external force is applied to change the direction of the rotor spin axis the gyro resists the change in move as the force right angles to the direction originally applied

221
Q

The simplest form of gyro only consists what.

A

Rotor

222
Q

The simplest form of gyro only consists what.

A

Rotor

223
Q

What is friction?

A

Force resisting the realities motion of materials rubbing against each other

224
Q

What is starting friction?

A

Can also be called static friction
Present when a body has been at rest
Present when a body begins to move under rest
Can be referred to as break away force

225
Q

When an attempt is made to move an object what must be done first?

A

It must be broken lose or started

226
Q

What is sliding friction?

A

Sliding friction is present as a body slides over another surface
Resistance to motion offered by an object has been set in motion
Amount of sliding friction depends on the nature on the nature of the nature of matirial surface

227
Q

What is sliding friction?

A

Sliding friction is present as a body slides over another surface
Resistance to motion offered by an object has been set in motion
Amount of sliding friction depends on the nature on the nature of the nature of matirial surface

228
Q

What is rolling friction?

A

Present between a rolling body and the surface on which it rolls
Resistance is gravely reduced if an object is mounted on wheels or rollers
Much smaller than sliding friction

229
Q

What has a different coefficient of friction?

A

Every pair of flat surfaces

230
Q

Coefficient efficient of sliding friction are less than what?

A

Less than the starting coefficient of starting friction

231
Q

What does density describe?

A

How closely packed the particles are in are in a solid, liquid, gas

232
Q

What does density depend on?

A

The matirial

233
Q

Scientists can measure how tightly packed particals are how?

A

Measuring the mass of a certain volume of the matirial

234
Q

What is the equation for density?

A

Density = mass / volume

235
Q

To convert kg/m^3 to g/cm^3 what do you do?

A

Divide by 1000

236
Q

To convert g/cm^3 to kg/m^3 what do you do?

A

Times by 1000

237
Q

What is a hydrometer used for?

A

To determine the septic gravity of an electrolyte in an aircraft battery

238
Q

When the battery is discharge the calibrated float will indicate what?

A

Approximately 1150

239
Q

What is the indication of a charged battery?

A

1275 and 1310

240
Q

The electrolyte in a distachrqged battery will be more dense that’s what?

A

1.5 times more dance than water

241
Q

What is viscosity?

A

Resistance of a fluid to change in shape or relative movement of neighbouring portions within the fluid

242
Q

Viscosity denotes as what?

A

Opposition to flow and is caused by the internal friction between monocles

243
Q

What is the equation for viscosity?

A

Viscosity = pascals * second

244
Q

What is the equation for viscosity?

A

Viscosity = pascals * second

245
Q

Viscosity is a major factor in determining what?

A

The forces that need to be overcome when fluids are used in lubrication or transported in pipelines

246
Q

What will determine how the air will flow around an aircraft?

A

Viscosity
Density
Compresabillity
Air temperature

247
Q

What will determine how the air will flow around an aircraft?

A

Viscosity
Density
Compresabillity
Air temperature

248
Q

When would the viscosity of a fluid decrease?

A

With an increase in tempreture

249
Q

What is fluid resistance?

A

It occurs when a solid travels through a liquid or a gas

250
Q

What are the factors that determine amount of fluid resistance on a solid objects?

A

Viscosity of the fluid
Surface
Texture
Shape

251
Q

What does streamlining mean?

A

Decreasing the amount of restrictive force of fluid friction

252
Q

If a liquid is compressible what will happen?

A

There I’ll be an increase in pressure and it will rise the fluids internal temperature and reduce its viscosity so velocity will increase

253
Q

The pressure in fluid pressure is exerted by what?

A

A column of liquid determined by the high of the column and the the of fluid

254
Q

What is the equation for fluid presure?

A

Pressure = force / area

255
Q

What is the equation for fluid presure?

A

Pressure = force / area

256
Q

What is the equation for fluid presure?

A

Pressure = force / area

257
Q

What does pascals law explain?

A

That when pressure is applied to a contained liquid the liquid exerts an equal pressure at right angles

258
Q

What is pascals law equation?

A

Force = area * pressure created bay the fluid

259
Q

How is the formula for force produced by a hydronic piston calculated?

A

By taking in to account the area of the piston that is subjected to pressure

260
Q

What is static pressure?

A

Exists in addition to dynamic factors that may also present at the same time

261
Q

What is static pressure?

A

Exists in addition to dynamic factors that may also present at the same time

262
Q

What is dynamic pressure?

A

The pressure that emerges form velocity of the fluid in motion

263
Q

What is dynamic pressure?

A

The pressure that emerges form velocity of the fluid in motion

264
Q

What is total pressure?

A

The sum of static and dynamic pressure

265
Q

What is Bernoulli’s printable?

A

Printable that explains the relationship between potential energy and kinetic energy

266
Q

In Bernoulli’s printable what is potential energy caused by?

A

The fluids total pressure

267
Q

What is kinetic energy caused by?

A

The fluids movement

268
Q

What does Bernoulli’s printable state?

A

When energy it not added or taken away from a fluid in motion the potential energy and presure will decrease when kinetic energy and velocity increases

269
Q

Where is a Venturi tube narrower?

A

Narrower in the middle

270
Q

Where is a Venturi tube narrower?

A

Narrower in the middle

271
Q

What happens when fluid in the Venturi tube enters the narrower section?

A

Presure decreases
Velocity increases

272
Q

Will the rate (volume per second) remain the same through the entire Venturi tube?

A

Yes it remains constant

273
Q

What are the three forms of energy within the moving fluid in a Venturi tube?

A

Gravitational potential energy of the particals
Pressure energy
Kinetic energy

274
Q

Pressure energy is what?

A

Energy stored in a fluid due to the force per area applied to it

M2 (3 decks)

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