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Katie Science Tests > Test 9 > Flashcards

Test 9 Flashcards

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1
Q

What is sound heard distinctly after being reflected from an object?

A

echo

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2
Q

What is a violent compression pulse caused by an object moving faster than the speed of sound?

A

shock wave

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3
Q

When two notes interfere in a disagreeable way, then result is?

A

dissonance

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4
Q

What is the rate of doing work?

A

power

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5
Q

A lens that is curved outward, causing light rays to converge and objects to appear magnified, is a ? lens.

A

convex

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6
Q

A change in sound frequency caused by an object’s motion is the ? effect.

A

Doppler

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7
Q

A measure of how well a machine converts input work into output work is the machine’s?

A

efficiency

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8
Q

The multiplication of force by a machine under ideal conditions is the ?

A

IMA

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9
Q

What is a series of organized sound waves with specific pitches that have been deliberately arranged?

A

music

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10
Q

Which of the following is not a color of the visible spectrum?

A

magenta

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11
Q

The subtractive primary colors of pigment are?

A

cyan, magenta, and yellow

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12
Q

What is the SI unit of force?

A

newton

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13
Q

What unit is used to measure sound intensity in a way that reflects how our ears perceive sound?

A

decibel

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14
Q

The technique of transmitting light through narrow glass cables, such as for communications, is?

A

fiber optics

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15
Q

What is the vector representing the change in an object’s position?

A

displacement

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16
Q

What is the process by which colors are produced by interference of reflected light, often seen in soap bubbles and thin films?

A

iridescence

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17
Q

A vector showing the combined effect of two or more vectors is a ?

A

resultant

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18
Q

What is the average speed of a person who walks 28 km in 7.0 hr?

A

4.0 km/hr

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19
Q

Who demonstrated that light consists of electromagnetic waves?

A

James Clerk Maxwell

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20
Q

A beam of light containing waves that all vibrate in the same direction is?

A

polarized

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21
Q

The angle of incidence equals the angle of reflection

A

law of reflection

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22
Q

For every action there is an equal and opposite reaction

A

3rd law of motion

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23
Q

When the overall external force acting on a system is zero, the momentum of the whole system remains constant

A

law of conservation of momentum

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24
Q

Any two objects attract each other with a force that depends on their masses and the distance between them.

A

law of universal gravitation

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25
Q

Force is directly proportional to mass and acceleration

A

2nd law of motion

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26
Q

The velocity of an object does not change unless the object is acted upon by an external force.

A

1st law of motion

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27
Q

What device uses reflected electromagnetic waves to measure the distance and direction of faraway objects?

A

radar

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28
Q

Name the scientist who predicted stimulated emission and formulated the theory of relativity.

A

Albert Einstein

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29
Q

On what does the energy of a photon depend?

A

frequency

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30
Q

What behavior of light causes the scintillation of stars?

A

refraction

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31
Q

What property of an object equals the product of the object’s mass and velocity

A

momentum

32
Q

What term refers to any change in speed, direction, or both?

A

acceleration

33
Q

What simple device uses diffraction to produce a better spectrum than a prism can produce?

A

diffraction grating

34
Q

What is a three-dimensional image produced by laser light?

A

hologram

35
Q

A lever that has the input force between the fulcrum and output force is a class ? lever.

A

3

36
Q

Sound waves are a type of ? wave.

A

longitudinal

37
Q

Which of the following is not an effect predicted by the special theory of relativity?

A

volume expansion

38
Q

Light that consists of only one frequency is?

A

monochromatic

39
Q

The frequency relationships between the fundamental and overtones are described by the ? series.

A

harmonic

40
Q

What type of friction keeps a stationary object from moving?

A

static

41
Q

Which of the following is not a property of laser light?

A

polarized

42
Q

What is a “center-seeking” force that causes an object to travel in a curved path rather than in a straight line?

A

centripetal force

43
Q

A physical quantity that has both magnitude and direction is a ? quantity.

A

vector

44
Q

How much work is done in lifting a 60 N box 2.0 m?

A

120 J

45
Q

What type of machine is a combination of fixed and movable pulleys?

A

block and tackle

46
Q

The type of ultraviolet radiation that causes suntans and sunburns is?

A

UVB

47
Q

Which group of instruments includes the clarinet?

A

woodwinds

48
Q

In what phenomenon does light knock electrons loose from the atoms of certain metals?

A

photoelectric effect

49
Q

What is the mutual reinforcement or cancellation that occurs when two or more waves meet?

A

interference

50
Q

What is the maximum distance that particles are displaced by a wave?

A

amplitude

51
Q

Find the speed of a wave that has a wavelength of 1.5 m and a frequency of 4.0 Hz.

A

6.0 m/s

52
Q

The process that occurs when an excited atom is struck by one photon and emits two photons is?

A

stimulated emission

53
Q

Sound with frequency above the range of human hearing is ? sound

A

ultrasonic

54
Q

What is the spread-out part of a longitudinal wave?

A

rarefaction pulse

55
Q

The speed of light is constant in a vacuum.

A

true

56
Q

The spreading out of a wave after it passes through a narrow opening is refraction.

A

diffraction

57
Q

The strength of a sound wave is its intensity

A

true

58
Q

The theory based on the ideas that all motion is relative to some reference point and that the speed of light is constant in relation to any observer is the general theory of relativity.

A

special

59
Q

The resistance arising to an object’s motion through a fluid or across a surface is momentum.

A

friction

60
Q

An arrangement of all forms of electromagnetic radiation in order of frequency and wavelength is the electromagnetic spectrum.

A

true

61
Q

Constructive interference of light in slit diffraction produces a light fringe called a node.

A

antinode

62
Q

The branches of physics developed since 1900 are called classical physics.

A

modern

63
Q

A combination of all the colors of light mixed together is perceived as white.

A

true

64
Q

Low-frequency waves widely used for communication

A

radio waves

65
Q

High-frequency electromagnetic waves used in medicine, dentistry, and airport security to “see” inside solid objects.

A

xrays

66
Q

The most powerful and penetrating form of electromagnetic radiation.

A

gamma rays

67
Q

Electromagnetic waves sometimes referred to as “heat rays”.

A

infrared waves

68
Q

The illusion of water covering a hot highway in the distance is an example of a(n)?

A

mirage

69
Q

The idea that gravity is an effect of the geometry of space is part of the ? theory of relativity.

A

general

70
Q

The fastest possible speed in the universe is the speed of ? in a vacuum.

A

light

71
Q

A visible spectrum in the sky produced by falling raindrops is a(n)?

A

rainbow

72
Q

Light consists of electromagnetic waves traveling as tiny bundles or packets of energy called?

A

photons

73
Q

The change in a wave’s direction when passing from one medium into another is?

A

refraction

74
Q

The effect of frequency on the way our ears perceives sounds is?

A

pitch

75
Q

The theory stating that light has characteristics of both particles and waves is the ? theory of light.

A

quantum

Katie Science Tests (11 decks)

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