Module2 /1

74問 • 1年前

問題一覧

The resistance of any physical object to any change in its state of motion is called

inertia

A body at rest remains at rest and a body in motion continues to move at constant velocity unless acted upon by an unbalanced external force is

Newton’s first law

the law of inertia is

Newton’s first law

The vector sum of the forces acting on the body in the x-direction and the y-direction is zero

the body is in equilibrium

a gyroscope maintain its alignment to a fixed point in space this characteristics is

Rigidity

The product of mass times velocity( MV) is

momentum

collisions that occur between bodies that deform very little in the collision

Elastic collisions

The impulse experienced by the object equals the

change in momentum of the object

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

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

Is Static friction

1slug is equals to

14.59 kilogram

For Every action has an equal and opposite reaction

Newton’s third law

Specific gravity has

no units

The density is measuredThe density is measured

kilogram per cubic meter (kg/m3

The specific gravity of a substance is calculated by

the density of the body divided by the density of water

Viscosity of a liquid decreases with

increasing temperature

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

4bar

Static pressure of airflow is sensed by

an orifice parallel to the airflow direction

Low speed fluid flowing through a convergent duct will

increase velocity and decrease in pressure

object can be made more streamlined by making it

Thinner and longer

The viscosity of a fluid can be described as

the internal resistance for fluid to flow

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

The density

Dynamic viscosity determines the dynamics of an

incompressible fluid

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

drag

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

Streamlining

A curved shape allows air to

flow smoothly around it

The pressure of a fluid that results from its motion

Dynamic pressure

the sum of the static pressure and the dynamic pressure

The total pressure

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

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

chord line of a wing

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

Angle of attack

thin layer of air in direct contact with the wing surface

boundary layer

The symbol used for density is the Greek

letter rho, (ρ)

The study of viscosity is known as

rheology

Bulk viscosity is the same as

volume viscosity

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

Pressure in a pipe is

force per unit area

300 K =

27 °C

Temperature is a measure of the amount of

internal kinetic energy in a material

All molecular motion seases at

a thermodynamic process where volume does not change is known as

An isochoric process

Boyle's law states that

pressure varies inversely with volume when temperature constant

heat transferred by convection via

Physical movement

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

Latent heat

kg of ice at 0°C has 1

less energy that water at 0°C

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

gradually as a function of radial distance from the fibre center

A convex lens is

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

Concave lens forming

a virtual image

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

same or less that the cone angle

Attenuation is mainly a result of light

absorption, scattering

A mirror

absorbs a percentage of light

Divergent light rays give rise to

a virtual image

Incident light travelling from air to water, the light is

bent towards the normal

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

be more than focal length

Wavelengths of visible light is usually measured

in Angstrom Ǻ

The light rays are obeying

snells law

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

the frequency times the wavelength

Is the measurement of apparent brightness to the

Photometry

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

real, inverted and smaller

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

anti-node

The first overtone of a sound wave is the

2nd harmonic

The speed of sound in air is

less than the speed in solids

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

the beats

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

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

a node

The fundamental frequency is the

1st harmonic

The speed of sound at standard atmospheric temperature and pressure is

340 m/s

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

no sound will be heard

The intensity of sound

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

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

increase

An example of a longitudinal wave is

Sound wave

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

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

Interference

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

Longitudinal Wave

Module5

Module5

Module 5 1

Module 5 1

Module 2

Module 2

Module9

Module9

Module 10

Module 10

Module 10/1

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Module 6

Module 6

Module 6/1

Module 6/1

Module 6/2

Module 6/2

問題一覧

The resistance of any physical object to any change in its state of motion is called

inertia

A body at rest remains at rest and a body in motion continues to move at constant velocity unless acted upon by an unbalanced external force is

Newton’s first law

the law of inertia is

Newton’s first law

The vector sum of the forces acting on the body in the x-direction and the y-direction is zero

the body is in equilibrium

a gyroscope maintain its alignment to a fixed point in space this characteristics is

Rigidity

The product of mass times velocity( MV) is

momentum

collisions that occur between bodies that deform very little in the collision

Elastic collisions

The impulse experienced by the object equals the

change in momentum of the object

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

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

Is Static friction

1slug is equals to

14.59 kilogram

For Every action has an equal and opposite reaction

Newton’s third law

Specific gravity has

no units

The density is measuredThe density is measured

kilogram per cubic meter (kg/m3

The specific gravity of a substance is calculated by

the density of the body divided by the density of water

Viscosity of a liquid decreases with

increasing temperature

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

4bar

Static pressure of airflow is sensed by

an orifice parallel to the airflow direction

Low speed fluid flowing through a convergent duct will

increase velocity and decrease in pressure

object can be made more streamlined by making it

Thinner and longer

The viscosity of a fluid can be described as

the internal resistance for fluid to flow

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

The density

Dynamic viscosity determines the dynamics of an

incompressible fluid

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

drag

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

Streamlining

A curved shape allows air to

flow smoothly around it

The pressure of a fluid that results from its motion

Dynamic pressure

the sum of the static pressure and the dynamic pressure

The total pressure

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

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

chord line of a wing

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

Angle of attack

thin layer of air in direct contact with the wing surface

boundary layer

The symbol used for density is the Greek

letter rho, (ρ)

The study of viscosity is known as

rheology

Bulk viscosity is the same as

volume viscosity

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

Pressure in a pipe is

force per unit area

300 K =

27 °C

Temperature is a measure of the amount of

internal kinetic energy in a material

All molecular motion seases at

a thermodynamic process where volume does not change is known as

An isochoric process

Boyle's law states that

pressure varies inversely with volume when temperature constant

heat transferred by convection via

Physical movement

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

Latent heat

kg of ice at 0°C has 1

less energy that water at 0°C

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

gradually as a function of radial distance from the fibre center

A convex lens is

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

Concave lens forming

a virtual image

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

same or less that the cone angle

Attenuation is mainly a result of light

absorption, scattering

A mirror

absorbs a percentage of light

Divergent light rays give rise to

a virtual image

Incident light travelling from air to water, the light is

bent towards the normal

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

be more than focal length

Wavelengths of visible light is usually measured

in Angstrom Ǻ

The light rays are obeying

snells law

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

the frequency times the wavelength

Is the measurement of apparent brightness to the

Photometry

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

real, inverted and smaller

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

anti-node

The first overtone of a sound wave is the

2nd harmonic

The speed of sound in air is

less than the speed in solids

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

the beats

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

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

a node

The fundamental frequency is the

1st harmonic

The speed of sound at standard atmospheric temperature and pressure is

340 m/s

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

no sound will be heard

The intensity of sound

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

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

increase

An example of a longitudinal wave is

Sound wave

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

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

Interference

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

Longitudinal Wave