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mod 2,2

mod 2,2
94 frågor • 1 år sedan
  • Aljuboory
    • rapportera

    Frågelista

  • 1

    • When you apply a force to a point around the spinning rim of the gyro

    the rotor will tilt as if the force was 90° further in the direction of motion

  • 2

    • The force between two objects that is not moving relative to each other

    Is Static friction

  • 3

    • 1 slug is equals to

    14.59 kilogram

  • 4

    • For Every action has an equal and opposite reaction:

    Newton’s third law

  • 5

    • Specific gravity has

    no units

  • 6

    • The density is measured

    kilogram per cubic meter (kg/m3).

  • 7

    • The specific gravity of a substance is calculated by

    the density of the body divided by the density of water.

  • 8

    • Viscosity of a liquid decreases with

    increasing temperature.

  • 9

    • If a dynamic pressure in a fluid is 3 bar and the static pressure is 1 bar the total pressure is:

    4 bar

  • 10

    • Static pressure of airflow is sensed by

    an orifice parallel to the airflow direction.

  • 11

    • Low speed fluid flowing through a convergent duct will

    increase velocity and decrease in pressure.

  • 12

    • object can be made more streamlined by making it

    Thinner and longer

  • 13

    • The viscosity of a fluid can be described as

    the internal resistance for fluid to flow

  • 14

    • The mass of a sample of the material divided by the volume of the same sample.

    The density

  • 15

    • Dynamic viscosity determines the dynamics of an

    incompressible fluid

  • 16

    • The force that resists the movement of a solid object through a fluid (a liquid or gas).

    drag

  • 17

    is the shaping of an object, to reduce the amount of drag or resistance to motion through a stream of air

    Streamlining

  • 18

    • A curved shape allows air to

    flow smoothly around it.

  • 19

    • The pressure of a fluid that results from its motion.

    Dynamic pressure

  • 20

    • the sum of the static pressure and the dynamic pressure

    The total pressure

  • 21

    • A tube constructed in such a way that the cross sectional area of the tube changes from a larger area to a smaller area and finally back to the same larger area.

    A Venturi tube

  • 22

    • a straight line connecting the leading edge of a wing to its trailing edge The

    chord line of a wing

  • 23

    • the angle between the chord line of a wing and the relative wind direction is

    Angle of attack

  • 24

    a thin layer of air in direct contact with the wing surface

    boundary layer

  • 25

    • The symbol used for density is the Greek

    letter rho, (ρ)

  • 26

    • The study of viscosity is known as

    rheology

  • 27

    Bulk viscosity is the same as

    volume viscosity

  • 28

    • is the shaping of an object, such as an aircraft body or wing, to reduce the amount of drag or resistance to motion through a stream of air

    Streamlining

  • 29

    • As air streams past the wing of an aeroplane, the speed of the air past the upper surface of the wing is

    greater than the speed of the air past the lower surface of the wing

  • 30

    • Pressure in a pipe is:

    force per unit area

  • 31

    • 300 K =

    27 °C

  • 32

    • 15 °C equal

    59 °F

  • 33

    • Temperature is a measure of the amount of

    (internal kinetic energy in a material)

  • 34

    • All molecular motion seases at

    0 K

  • 35

    • a thermodynamic process where volume does not change is known as:

    An isochoric process

  • 36

    • Boyle's law states that

    pressure varies inversely with volume when temperature constant

  • 37

    • heat transferred by convection via

    Physical movement

  • 38

    • The type of heat energy transferred when state solid, liquid or gas is called

    Latent heat

  • 39

    • 1 kg of ice at 0°C has

    less energy that water at 0°C

  • 40

    • An effective and efficient refrigerant should have:

    low condensing pressure, low evaporating temperature

  • 41

    • A process where temperature remains the same is known as:

    isothermal

  • 42

    • Charles 'law states that Volume:

    varies directly with temperature when pressure remains constant.

  • 43

    • Heat is transferred by conduction via

    transfer of kinetic energy of the molecular particles

  • 44

    • The heat generated when 1kg of fuel burned is known as:

    heat of combustion

  • 45

    • heat exchanged by a body or thermodynamic system in which the exchange of heat changes the temperature of the body is:

    Sensible heat

  • 46

    • 1 kg of ice at 0°C has

    more volume that water at 0°C

  • 47

    • A refrigerant which is absorbing heat from its surrounding is:

    evaporating

  • 48

    • transfer heat from a hot area to cold area is:

    conduction

  • 49

    • When liquids is heated it will

    expand more than solid

  • 50

    • P1 V1 = P2 V2 at constant temperature is

    Boyle’s law

  • 51

    • The process with no heat transfer into or out of a system is

    An adiabatic

  • 52

    • a device that measures temperature or a temperature gradient is

    A Thermometer

  • 53

    • One of Platinum resistance thermometer disadvantages:

    Slow response time

  • 54

    • Thermistors are semiconductors in which

    the resistance changes with temperature

  • 55

    • The thermocouple relies on the

    Seebeck effect

  • 56

    • Between melting point of ice and the boiling point of water (at standard sea level pressure).

    The scale has 100 units

  • 57

    • To convert from Fahrenheit to Celsius:

    subtract 32, then multiply by 5, then divide by 9

  • 58

    • Celsius to Kelvin:

    add 273

  • 59

    the amount of heat needed to raise the temperature of 1 lb. of water 1°F

    • 1 BTU

  • 60

    • Conduction is the transfer of energy through

    matter from particle to particle.

  • 61

    • Mercury is the only one in liquid state at room temperature.

    It has high coefficient of expansion

  • 62

    • -40 °C equal

    -40 °F

  • 63

    fibres has abrupt change called the step change in refractive index

    • Step-index

  • 64

    • a concave mirror

    thinner at the middle(center)

  • 65

    • In graded-index fibres, the refractive index of the core varies

    gradually as a function of radial distance from the fibre center

  • 66

    • A convex lens is

    thick across the middle and thin at the upper and lower edges.

  • 67

    • Concave lens forming

    a virtual image

  • 68

    • For light to travel down a fiber optic cable without escaping it entry angle must be the

    same or less that the cone angle

  • 69

    • Attenuation is mainly a result of light

    absorption, scattering,

  • 70

    • A mirror

    absorbs a percentage of light

  • 71

    • Divergent light rays give rise to

    a virtual image.

  • 72

    • Incident light travelling from air to water, the light is

    bent towards the normal.

  • 73

    • In order for a converging lens to form a real image, the object distance must

    be more than focal length.

  • 74

    • Wavelengths of visible light is usually measured

    in Angstrom Ǻ

  • 75

    • The light rays are obeying

    snells law.

  • 76

    • As in the case of all wave motion, the speed of electromagnetic radiation equals

    the frequency times the wavelength

  • 77

    Is the measurement of apparent brightness to the human eye.

    • Photometry

  • 78

    • If, with a concave mirror the image is placed beyond the centre of curvature, the image produced will be

    real, inverted and smaller.

  • 79

    • In a standing wave the point where continuous vibration of maximum amplitude occurs is called the

    anti-node.

  • 80

    • By Increasing the frequency of a sound wave increases its

    pitch

  • 81

    • The first overtone of a sound wave is the

    2nd harmonic

  • 82

    • The speed of sound in air is

    less than the speed in solids

  • 83

    • The beat frequency is always equal to the difference in frequency of the two notes that interfere to produce

    the beats

  • 84

    • A loud train is approaching you at high speed whilst you stand stationary on station plat form, as the train passes you the pitch of its sound will:

    decrease

  • 85

    • In a vibrating string, the point at which there is no displacement is called

    a node

  • 86

    • The fundamental frequency is the

    1st harmonic.

  • 87

    • The speed of sound at standard atmospheric temperature and pressure is

    340 m/s.

  • 88

    • If two identical sound waves overlap, but (180⁰) out of phase

    no sound will be heard

  • 89

    • The intensity of sound

    decreases inversely with the square of the distance from the source of sound

  • 90

    • The speed of sound in dry air at 341 m/s, in solids the speed would

    increase

  • 91

    • An example of a longitudinal wave is:

    Sound wave

  • 92

    • The distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough.

    The amplitude

  • 93

    • A phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

    Interference

  • 94

    • A wave in which the vibrations are parallel to, or along, the direction of travel is a

    Longitudinal Wave

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    Frågelista

  • 1

    • When you apply a force to a point around the spinning rim of the gyro

    the rotor will tilt as if the force was 90° further in the direction of motion

  • 2

    • The force between two objects that is not moving relative to each other

    Is Static friction

  • 3

    • 1 slug is equals to

    14.59 kilogram

  • 4

    • For Every action has an equal and opposite reaction:

    Newton’s third law

  • 5

    • Specific gravity has

    no units

  • 6

    • The density is measured

    kilogram per cubic meter (kg/m3).

  • 7

    • The specific gravity of a substance is calculated by

    the density of the body divided by the density of water.

  • 8

    • Viscosity of a liquid decreases with

    increasing temperature.

  • 9

    • If a dynamic pressure in a fluid is 3 bar and the static pressure is 1 bar the total pressure is:

    4 bar

  • 10

    • Static pressure of airflow is sensed by

    an orifice parallel to the airflow direction.

  • 11

    • Low speed fluid flowing through a convergent duct will

    increase velocity and decrease in pressure.

  • 12

    • object can be made more streamlined by making it

    Thinner and longer

  • 13

    • The viscosity of a fluid can be described as

    the internal resistance for fluid to flow

  • 14

    • The mass of a sample of the material divided by the volume of the same sample.

    The density

  • 15

    • Dynamic viscosity determines the dynamics of an

    incompressible fluid

  • 16

    • The force that resists the movement of a solid object through a fluid (a liquid or gas).

    drag

  • 17

    is the shaping of an object, to reduce the amount of drag or resistance to motion through a stream of air

    Streamlining

  • 18

    • A curved shape allows air to

    flow smoothly around it.

  • 19

    • The pressure of a fluid that results from its motion.

    Dynamic pressure

  • 20

    • the sum of the static pressure and the dynamic pressure

    The total pressure

  • 21

    • A tube constructed in such a way that the cross sectional area of the tube changes from a larger area to a smaller area and finally back to the same larger area.

    A Venturi tube

  • 22

    • a straight line connecting the leading edge of a wing to its trailing edge The

    chord line of a wing

  • 23

    • the angle between the chord line of a wing and the relative wind direction is

    Angle of attack

  • 24

    a thin layer of air in direct contact with the wing surface

    boundary layer

  • 25

    • The symbol used for density is the Greek

    letter rho, (ρ)

  • 26

    • The study of viscosity is known as

    rheology

  • 27

    Bulk viscosity is the same as

    volume viscosity

  • 28

    • is the shaping of an object, such as an aircraft body or wing, to reduce the amount of drag or resistance to motion through a stream of air

    Streamlining

  • 29

    • As air streams past the wing of an aeroplane, the speed of the air past the upper surface of the wing is

    greater than the speed of the air past the lower surface of the wing

  • 30

    • Pressure in a pipe is:

    force per unit area

  • 31

    • 300 K =

    27 °C

  • 32

    • 15 °C equal

    59 °F

  • 33

    • Temperature is a measure of the amount of

    (internal kinetic energy in a material)

  • 34

    • All molecular motion seases at

    0 K

  • 35

    • a thermodynamic process where volume does not change is known as:

    An isochoric process

  • 36

    • Boyle's law states that

    pressure varies inversely with volume when temperature constant

  • 37

    • heat transferred by convection via

    Physical movement

  • 38

    • The type of heat energy transferred when state solid, liquid or gas is called

    Latent heat

  • 39

    • 1 kg of ice at 0°C has

    less energy that water at 0°C

  • 40

    • An effective and efficient refrigerant should have:

    low condensing pressure, low evaporating temperature

  • 41

    • A process where temperature remains the same is known as:

    isothermal

  • 42

    • Charles 'law states that Volume:

    varies directly with temperature when pressure remains constant.

  • 43

    • Heat is transferred by conduction via

    transfer of kinetic energy of the molecular particles

  • 44

    • The heat generated when 1kg of fuel burned is known as:

    heat of combustion

  • 45

    • heat exchanged by a body or thermodynamic system in which the exchange of heat changes the temperature of the body is:

    Sensible heat

  • 46

    • 1 kg of ice at 0°C has

    more volume that water at 0°C

  • 47

    • A refrigerant which is absorbing heat from its surrounding is:

    evaporating

  • 48

    • transfer heat from a hot area to cold area is:

    conduction

  • 49

    • When liquids is heated it will

    expand more than solid

  • 50

    • P1 V1 = P2 V2 at constant temperature is

    Boyle’s law

  • 51

    • The process with no heat transfer into or out of a system is

    An adiabatic

  • 52

    • a device that measures temperature or a temperature gradient is

    A Thermometer

  • 53

    • One of Platinum resistance thermometer disadvantages:

    Slow response time

  • 54

    • Thermistors are semiconductors in which

    the resistance changes with temperature

  • 55

    • The thermocouple relies on the

    Seebeck effect

  • 56

    • Between melting point of ice and the boiling point of water (at standard sea level pressure).

    The scale has 100 units

  • 57

    • To convert from Fahrenheit to Celsius:

    subtract 32, then multiply by 5, then divide by 9

  • 58

    • Celsius to Kelvin:

    add 273

  • 59

    the amount of heat needed to raise the temperature of 1 lb. of water 1°F

    • 1 BTU

  • 60

    • Conduction is the transfer of energy through

    matter from particle to particle.

  • 61

    • Mercury is the only one in liquid state at room temperature.

    It has high coefficient of expansion

  • 62

    • -40 °C equal

    -40 °F

  • 63

    fibres has abrupt change called the step change in refractive index

    • Step-index

  • 64

    • a concave mirror

    thinner at the middle(center)

  • 65

    • In graded-index fibres, the refractive index of the core varies

    gradually as a function of radial distance from the fibre center

  • 66

    • A convex lens is

    thick across the middle and thin at the upper and lower edges.

  • 67

    • Concave lens forming

    a virtual image

  • 68

    • For light to travel down a fiber optic cable without escaping it entry angle must be the

    same or less that the cone angle

  • 69

    • Attenuation is mainly a result of light

    absorption, scattering,

  • 70

    • A mirror

    absorbs a percentage of light

  • 71

    • Divergent light rays give rise to

    a virtual image.

  • 72

    • Incident light travelling from air to water, the light is

    bent towards the normal.

  • 73

    • In order for a converging lens to form a real image, the object distance must

    be more than focal length.

  • 74

    • Wavelengths of visible light is usually measured

    in Angstrom Ǻ

  • 75

    • The light rays are obeying

    snells law.

  • 76

    • As in the case of all wave motion, the speed of electromagnetic radiation equals

    the frequency times the wavelength

  • 77

    Is the measurement of apparent brightness to the human eye.

    • Photometry

  • 78

    • If, with a concave mirror the image is placed beyond the centre of curvature, the image produced will be

    real, inverted and smaller.

  • 79

    • In a standing wave the point where continuous vibration of maximum amplitude occurs is called the

    anti-node.

  • 80

    • By Increasing the frequency of a sound wave increases its

    pitch

  • 81

    • The first overtone of a sound wave is the

    2nd harmonic

  • 82

    • The speed of sound in air is

    less than the speed in solids

  • 83

    • The beat frequency is always equal to the difference in frequency of the two notes that interfere to produce

    the beats

  • 84

    • A loud train is approaching you at high speed whilst you stand stationary on station plat form, as the train passes you the pitch of its sound will:

    decrease

  • 85

    • In a vibrating string, the point at which there is no displacement is called

    a node

  • 86

    • The fundamental frequency is the

    1st harmonic.

  • 87

    • The speed of sound at standard atmospheric temperature and pressure is

    340 m/s.

  • 88

    • If two identical sound waves overlap, but (180⁰) out of phase

    no sound will be heard

  • 89

    • The intensity of sound

    decreases inversely with the square of the distance from the source of sound

  • 90

    • The speed of sound in dry air at 341 m/s, in solids the speed would

    increase

  • 91

    • An example of a longitudinal wave is:

    Sound wave

  • 92

    • The distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough.

    The amplitude

  • 93

    • A phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

    Interference

  • 94

    • A wave in which the vibrations are parallel to, or along, the direction of travel is a

    Longitudinal Wave