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Physical Science > Ch. 12 > Flashcards

Ch. 12 Flashcards

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0
Q

The spreading apart of particles

A

Rarefaction

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1
Q

When dealing with a pendulum, what is it called when the pendulum is hanging straight down?

A

Rest position

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2
Q

What is the matter through which waves travel from place to place

A

Medium

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3
Q

The motion that repeats at a constant rate is

A

Periodic motion

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4
Q

What is the natural folding or flowing or waves around the corner

A

Diffraction

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5
Q

Both field and contact forces can do work.

A

True

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6
Q

Periodic motion is rare in nature.

A

False

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7
Q

All periodic motion can happen in a vacuum.

A

False

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8
Q

All periodic motion can be expressed in terms of circular motion.

A

True

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9
Q

No damping occurs in an ideal periodic motion.

A

True

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10
Q

Damping affects mainly the amplitude of a periodic system.

A

True

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11
Q

All restoring forces are field forces.

A

False

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12
Q

Transverse waves and longitudinal waves’ crest and troughs are identical.

A

False

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13
Q

The mass of a pendulum’s weight affects its period.

A

False

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14
Q

The pendulums period is affected by the length of the arm.

A

True

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15
Q

In mechanical waves, matter more over great distances with the wave.

A

False

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16
Q

For any wave, the distance between two crests is the same as the distance between the two troughs.

A

True

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17
Q

Water particles in a wave of water may move in circular patterns.

A

True

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18
Q

Sund waves are good examples of transverse waves.

A

False

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19
Q

Nearly all waves can experience reflection and refraction.

A

True

20
Q

Only two waves can interfere at one time.

A

False

21
Q

Only transverse waves experience interference.

A

False

22
Q

A standing wave does not move.

A

False

23
Q

Beats have lower frequency than the interfering waves that form them.

A

True

24
Q

Sound waves, like light waves, can have “shadows.”

A

True

25
Q

The amplitude of a sound wave determines its pitch.

A

False

26
Q

Only sound waves exhibit the Doppler effect.

A

False

27
Q

Which of the following is not an example of periodic motion?

A

A car traveling down a straight road

28
Q

Increasing the mass of vibrating object will

A

Increase its period

29
Q

What force does not act on a pendulum?

A

Mass

30
Q

To shorten the period of a pendulum

A

Decrease the length of the arm

31
Q

All waves transmit

A

Energy

32
Q

Which is the best description for vibrational waves that travel down a string?

A

Transverse

33
Q

Which is the best description for earthquake waves?

A

Both longitudinal and transverse

34
Q

A wave travels down a stretch string to the end where it is fixed to a will. What happens to the wave?

A

It is reflected

35
Q

After two waves collide, they

A

Move on independently

36
Q

While in the front yard, you can hear your dog barking in the backyard. This situation illustrates that Lund waves can

A

Diffract

37
Q

A jet fighter approaches, pass low overhead, and flies away. How does the pitch of the engine when it is overhead compare to when it was approaching

A

Lower

38
Q

The fastest waves in the universe are ______________ waves.

A

Electromagnetic

39
Q

Repetitive motion can be classified as either __________ or __________.

A

Oscillations

Vibrations

40
Q

In periodic motion the opposite of damping is _________.

A

Resonance

41
Q

A single wave cycle or very short burst of waves is called a

A

Pulse

42
Q

What is the period of the earth’s rotation on its axis?

A

24 hours

43
Q

What is the SI unit for frequency?

A

Hertz (Hz)

44
Q

What is the symbol that represents wavelength

A

Lambda

45
Q

F= 1/T

A

Frequency

46
Q

T= 2pi sqr route or I/g

A

Period

47
Q

v= 2lmbda f

A

Wave speed

Physical Science (4 decks)

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