mod 2 test

100問 • 1年前

Aljuboory

通報

問題一覧

protons and neutron in the nucleus

valence shell

protons and neutron only

is deficient of one or more electrons

protons and neutron

heat of vaporization

outwards from the nucleus

extra electrons

two neutrons

positively charged particles

protons and neutrons

3 electrons in outer shell

molecule

not expand to fill the container it is in

compression

60 Kpa

45NM

permanent deformation takes place

10N

Archimedes principle

twice the pressure at depth of 1 meter

• 1 newton is equal to

1 kilogram meter per second per second

• A force perpendicular to a beam produce stress called

shear

• SI unit of pressure is

newton per meter squared NM²

• Slug is the standard unit

of mass

• The standard temperature for reading a mercury barometer is

either 0 ⁰ C or 32⁰ F

• A mass of sugar having a weight of 45N is

4.59kg

is a dimensionless quantity representing the amount of matter in a particle or object

Mass

• the force in metric system is measured in

newton (N)

• The relationship between the metric and imperial units is given by the conversion factor 1 lb. =

4.448 N

• weight is a measure of the

force toward the geometrical center of earth

• The mass of an object at the moon is the

same as at the earth

• The equation relating mass and weight is:

w = mg

• A vector quantity is a quantity that is fully described by

both magnitude and direction

is a primary stress that tries to pull a body apart.

Tension

is the ability of a material to return to its original shape after deformation

Elasticity

• When an object is in equilibrium:

sum of anticlockwise moments= sum of clockwise moments

• If an object is removed from air into water

its weight will decrease

• A pair of forces of magnitude F that are equal and opposite but applied at points separated by a distance d perpendicular to the forces is

couple

of a force about a point is the product of the force and the perpendicular distance.

the moment

• The horizontal distance that an item is located from the datum is

the arm

is a term used to express cabin pressure in terms of equivalent altitude above sea level

Cabin altitude

• What is acceleration?

Rate of change of velocity

• The gravitational pull of the earth on a given body called

weight

• What a frequency of a pendulum that swings 1 cycle every 40 millisecond?

25hz

• Resonance occurs in a vibrating object when the external excitation frequency is equal to the

Natural frequency of the object

• What is the velocity of a shaft rotating 600 revolutions per minute?

20 pi radians/second

• The centripetal force of moving object in circular path will

increase when both mass and speed increased.

• A cyclist starts from 60m/s and accelerates to 80 m/s in 4 seconds, the acceleration is

5m/s²

• The time period of a pendulum swing depends upon the earth’s gravity and

length of the pendulum only

• A body rotating at angular velocity of 5 radians/second, with a radius of 5 meter its speed is

25 meters/second

• A mass on a spring nearly hits the ground 20 times a minute, its frequency is

1/3 cycle per second.

• What force is required to produce an acceleration of 5 m/s² on a mass of 2 kg (F = ma) = 2 * 5 =

10 Newton's

• A body starts from the rest and accelerates at rate of 20meter/second square. What is the distance covered whet it reached a velocity of 50 meter per second?

62.5meters

• A single fixed pulley (discounting friction) has a mechanical advantage of

• What is the kinetic energy of an aircraft of mass of 2 metric tonnes and has a velocity of 2m/s?

4 kJ.

• If body starts at rest and reaches 84meter/second in 3 seconds, what is its acceleration?

28m/s²

• A radian is equal to

57.3⁰

• Newton’s first law is called :

(the ‘inertia’ law)

• When body is moving in straight line at constant speed:

it is not accelerating

• 10 kg of steel is heated from 30 °C to 150 °C. Its density will

decrease

• A body accelerates when changing

speed and/or direction

• In formula A= v-u/t.. U stands for

initial velocity

• A free-falling object has an acceleration at a linear rate of

32ft/s/s in imperial system

• the central angle subtending a length of arc equal to the radius of the circle is A radian • 2pi radians is equal to

one revolution

• a force of 1 lb. when applied to a mass of 1 slug gives it an acceleration of

1 ft./sec²

• The centrifugal force acting on an object travelling in a circular path acts

away from the centre of the circle.

is the phenomenon of producing large amplitude of vibrations by a small periodic driving force

• Resonance

• The ratio of the useful work performed by a machine to the total energy expended or heat taken in is called

efficiency

• A cyclist starts from 10m/s and accelerates to 85 m/s in 5 seconds, the acceleration is

15m/s²

• The symbol that is used to represent the angular velocity is the

Greek letter omega

• A body started from rest and has been falling freely for 3 seconds. At what speed is it falling?

96ft/s

• 2pi radians is equal to

360⁰

• Common experience indicates that falling bodies

accelerate or increase in speed as they fall

• The time required to complete a full cycle, T in seconds.

Period

• If you push an object with a force of 5 N for 20 m in 4 seconds, power is

25 watt

• If you push an object with a force of 5 N for 20 m in 4 seconds, energy is

100 Joule

• A force of 15N required to move a mass of 300 kg with a constant velocity, find the coefficient of friction of the opposing force

0.005

• the ratio of the useful work performed by a machine to the total energy expended or heat taken in Is

EFFICIENCY

• Rolling resistance is also known as

a dynamic friction

• the rate of precession in a free gyro is

directly proportional to strength of the force (applied torque)

• A momentum of a mass 8kg traveling at speed of 8m/s

64kg m/s

• A force of 5N is applied to an object for 3 seconds, what is the impulse?

15Ns

• Static friction required the

largest force to overcome it

• The rigidity of gyroscope is determine by:

the mass of the rotor, its rotational speed and radius at which it acts

• An aeroplane of mass 5,000 kg flies with a momentum of1000, 000kgm/s, what is its velocity?

200m/s

• An object experiences an impulse of 8Ns for 2 seconds, how much force applied during impulse?

• The SI unit for momentum is

kilogram meter per second

• the precession of the gyro is directly proportional to

the torque applied

• The Properties of the gyro

are Rigidity and Precession

moves in all three planes and is stabilized to a fixed point in space.

• A space gyro

• 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

100

• The impulse experienced by the object equals the

change in momentum of the object

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問題一覧

protons and neutron in the nucleus

valence shell

protons and neutron only

is deficient of one or more electrons

protons and neutron

heat of vaporization

outwards from the nucleus

extra electrons

two neutrons

positively charged particles

protons and neutrons

3 electrons in outer shell

molecule

not expand to fill the container it is in

compression

60 Kpa

45NM

permanent deformation takes place

10N

Archimedes principle

twice the pressure at depth of 1 meter

• 1 newton is equal to

1 kilogram meter per second per second

• A force perpendicular to a beam produce stress called

shear

• SI unit of pressure is

newton per meter squared NM²

• Slug is the standard unit

of mass

• The standard temperature for reading a mercury barometer is

either 0 ⁰ C or 32⁰ F

• A mass of sugar having a weight of 45N is

4.59kg

is a dimensionless quantity representing the amount of matter in a particle or object

Mass

• the force in metric system is measured in

newton (N)

• The relationship between the metric and imperial units is given by the conversion factor 1 lb. =

4.448 N

• weight is a measure of the

force toward the geometrical center of earth

• The mass of an object at the moon is the

same as at the earth

• The equation relating mass and weight is:

w = mg

• A vector quantity is a quantity that is fully described by

both magnitude and direction

is a primary stress that tries to pull a body apart.

Tension

is the ability of a material to return to its original shape after deformation

Elasticity

• When an object is in equilibrium:

sum of anticlockwise moments= sum of clockwise moments

• If an object is removed from air into water

its weight will decrease

• A pair of forces of magnitude F that are equal and opposite but applied at points separated by a distance d perpendicular to the forces is

couple

of a force about a point is the product of the force and the perpendicular distance.

the moment

• The horizontal distance that an item is located from the datum is

the arm

is a term used to express cabin pressure in terms of equivalent altitude above sea level

Cabin altitude

• What is acceleration?

Rate of change of velocity

• The gravitational pull of the earth on a given body called

weight

• What a frequency of a pendulum that swings 1 cycle every 40 millisecond?

25hz

• Resonance occurs in a vibrating object when the external excitation frequency is equal to the

Natural frequency of the object

• What is the velocity of a shaft rotating 600 revolutions per minute?

20 pi radians/second

• The centripetal force of moving object in circular path will

increase when both mass and speed increased.

• A cyclist starts from 60m/s and accelerates to 80 m/s in 4 seconds, the acceleration is

5m/s²

• The time period of a pendulum swing depends upon the earth’s gravity and

length of the pendulum only

• A body rotating at angular velocity of 5 radians/second, with a radius of 5 meter its speed is

25 meters/second

• A mass on a spring nearly hits the ground 20 times a minute, its frequency is

1/3 cycle per second.

• What force is required to produce an acceleration of 5 m/s² on a mass of 2 kg (F = ma) = 2 * 5 =

10 Newton's

• A body starts from the rest and accelerates at rate of 20meter/second square. What is the distance covered whet it reached a velocity of 50 meter per second?

62.5meters

• A single fixed pulley (discounting friction) has a mechanical advantage of

• What is the kinetic energy of an aircraft of mass of 2 metric tonnes and has a velocity of 2m/s?

4 kJ.

• If body starts at rest and reaches 84meter/second in 3 seconds, what is its acceleration?

28m/s²

• A radian is equal to

57.3⁰

• Newton’s first law is called :

(the ‘inertia’ law)

• When body is moving in straight line at constant speed:

it is not accelerating

• 10 kg of steel is heated from 30 °C to 150 °C. Its density will

decrease

• A body accelerates when changing

speed and/or direction

• In formula A= v-u/t.. U stands for

initial velocity

• A free-falling object has an acceleration at a linear rate of

32ft/s/s in imperial system

• the central angle subtending a length of arc equal to the radius of the circle is A radian • 2pi radians is equal to

one revolution

• a force of 1 lb. when applied to a mass of 1 slug gives it an acceleration of

1 ft./sec²

• The centrifugal force acting on an object travelling in a circular path acts

away from the centre of the circle.

is the phenomenon of producing large amplitude of vibrations by a small periodic driving force

• Resonance

• The ratio of the useful work performed by a machine to the total energy expended or heat taken in is called

efficiency

• A cyclist starts from 10m/s and accelerates to 85 m/s in 5 seconds, the acceleration is

15m/s²

• The symbol that is used to represent the angular velocity is the

Greek letter omega

• A body started from rest and has been falling freely for 3 seconds. At what speed is it falling?

96ft/s

• 2pi radians is equal to

360⁰

• Common experience indicates that falling bodies

accelerate or increase in speed as they fall

• The time required to complete a full cycle, T in seconds.

Period

• If you push an object with a force of 5 N for 20 m in 4 seconds, power is

25 watt

• If you push an object with a force of 5 N for 20 m in 4 seconds, energy is

100 Joule

• A force of 15N required to move a mass of 300 kg with a constant velocity, find the coefficient of friction of the opposing force

0.005

• the ratio of the useful work performed by a machine to the total energy expended or heat taken in Is

EFFICIENCY

• Rolling resistance is also known as

a dynamic friction

• the rate of precession in a free gyro is

directly proportional to strength of the force (applied torque)

• A momentum of a mass 8kg traveling at speed of 8m/s

64kg m/s

• A force of 5N is applied to an object for 3 seconds, what is the impulse?

15Ns

• Static friction required the

largest force to overcome it

• The rigidity of gyroscope is determine by:

the mass of the rotor, its rotational speed and radius at which it acts

• An aeroplane of mass 5,000 kg flies with a momentum of1000, 000kgm/s, what is its velocity?

200m/s

• An object experiences an impulse of 8Ns for 2 seconds, how much force applied during impulse?

• The SI unit for momentum is

kilogram meter per second

• the precession of the gyro is directly proportional to

the torque applied

• The Properties of the gyro

are Rigidity and Precession

moves in all three planes and is stabilized to a fixed point in space.

• A space gyro

• 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

100

• The impulse experienced by the object equals the

change in momentum of the object