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physics Final examination > Waves and Sounds > Flashcards

Waves and Sounds Flashcards

1
Q

a traveling disturbance

A

wave

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2
Q

it carries energy from place to place

A

wave

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3
Q

a wave that is one in which the disturbance occurs parallel to the line of travel of the wave.

A

Longitudinal Wave

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4
Q

Sound wave is a __________

A

longitudinal wave

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5
Q

one in which the disturbance occurs perpendicular to the direction of travel of wave.

A

Transverse Wave

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6
Q
  • Radio wave
  • Light Waves
  • Microwaves

is what type of waves?

A

Transverse Wave

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7
Q

it travels on the strings of instruments such as guitars and banjos.

A

Transverse waves

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8
Q

consists of cycle or patterns that are produced over and over again by the source.

A

Periodic Wave

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9
Q

Every segment of the slinky vibrates in ____________, provided the end of the slinky is moved in ______________.

A

Simple Harmonic Motion

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10
Q

the repetitive movement back and forth through a equilibrium, or central position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side.

A

Simple Harmonic Motion

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11
Q

A wave that does not appear to travel. Each point on the standing wave will oscillate about a point on the axis of the wave.

A

Standing Wave

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12
Q

Standing waves are formed by the _________ of two traveling waves of the same frequency (With the same polarizationand the same amplitude) travelling in opposite directions.

This is usually achieved by using a traveling wave and its reflection, which will ensure that the frequency is the same.

A

Superposition

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13
Q

Points on a stationary wave that osciallate with maximum amplitude.

A

Antinodes

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14
Q

points of zero amplitude and appear to be fixed.

A

Nodes

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15
Q

the maximum excursion of a particle of the medium from the particles undisturbed position.

A

Amplitude

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16
Q

the horizontal length of one cycle of the wave.

A

Wavelength

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17
Q

the time required for one complete cycle.

A

Period

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18
Q

related to the period and has units of Hz or s-1

A

Frequency

19
Q

Frequency Formula

A

f = 1/T

20
Q

A train is moving at a ________- serves as an analogy for a traveling wave. A simple relation exists between the period, the wavelength, and the speed of any periodic.

A

Constant speed

21
Q

The speed at which the wave moves to the right depends on how quickly one particle of the string is accelerated upward in response to the __________

A

Net pulling force

22
Q

A longitudinal wave that is created by a vibrating object, such as a guitar string, the human vocal cords or diaphragm of a loudspeaker.

A

Sounds

23
Q

Sounds can be created or transmitted __________ such as a solid, liquid or gas.

A

Only in a medium

24
Q

Sounds cannot exist in _________

A

Vacuum

25
Q

The distance between adjacent ___________ is equal to the wavelength of the sound wave.

A

condensations

26
Q

__________ and ________ travels from the speaker to the lister but the individual air molecules do not move with the wave. A given molecule vibrates back and forth about a fixed location.

A

Condensation
Rarefractions

27
Q

the number of cycles per second

A

Frequency

28
Q

A sound with a single frequency

A

Pure tone

29
Q

the brain interprets the frequency in terms of the subjective quality

A

Pitch

30
Q

an attribute of a sound that depends primarily on the pressure amplitude of the wave

A

Loudness

31
Q

Sound travels through ____ liquids and solids at considerably different speed.

A

Gases

32
Q

It carry energy that can be used to do work.

A

Sound Waves

33
Q

the amount of energy transported per second

A

Power

34
Q

defined as the power that passes perpendicularly through a surface divided by the area of that surface.

A

Sound Intensity

35
Q

For a 1000 Hz tone, the smallest sound intensity that the human ear can detect is about _______________.

A

1x10^12 W/m^2

36
Q

For a 1000 Hz tone, the smallest sound intensity that the human ear can detect is about 1x10^12 W/m^2. This intensity is called the __________________

A

Threshold of Hearing

37
Q

If the sounds emits sound _________________, the intensity depends on the distance from the source in a simple way.

A

uniformly in all directions

38
Q

a measurement unit used when comparing two sound intensities.

A

Decimbel (dB)

39
Q

The way in which human hearing mechanism responds to intensity, it is appropriate to use a logarithmic scale

A

Intensity Level

40
Q

Note that log(1) =

A

0

41
Q

the intensity of the sound is equal to the threshold of hearing

A

the intensity level is zero.

42
Q

reference intensity formula

A

1.00 x 10^12 W/m^2

43
Q

the change in frequency or pitch of the sound detected by an observer because the sound source and the observer have different velocities with respect to the medium of sound propagation.

A

Doppler Effect

44
Q
A

physics Final examination (4 decks)

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