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MCAT physics & math > Waves & Sound > Flashcards

Waves & Sound Flashcards

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1
Q

Transverse waves

A

DIrection of particle oscilation is perpendicular to the propagation of the wave

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2
Q

Longitudinal wave

A

Particles of the wave oscillate parallel to the direction of the propagation;in direction of energy transfer
Slinky

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3
Q

What kind of waves are sound wave?

A

Longitudinal waves

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4
Q

Rarefaction

A

Decompression

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5
Q

Wavelength

A

Distance from crest to crest or trough to trough

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6
Q

Frequency

A

Number of wavelengths passing a fixed point per second

Hertz/cycles per second

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7
Q

Propagation of a wave equation

A

v=f(wavelength)

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8
Q

Period

A

Number of seconds per cycle

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9
Q

Angular frequency

A

Radias/sec, springs & pendula

=2(pi)f=2(pi)/T

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10
Q

Amplitude

A

Maximum magnitude of displacement from equilibrium position

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11
Q

Phase difference

A

How in or out of step waves are, trough to crest would be wavelength/2 or 180 degrees out of step

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12
Q

What is the degrees of one wave cycle/wavelength

A

360 degrees

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13
Q

Principle of superposition

A

When waves interact with each other, the displacement of the resultant wave at any point is the sum of the displacements of two interacting waves

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14
Q

Constructive interference

A

When wave amplitudes are added together

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15
Q

Destructive interference

A

When waves are out of step & subtracted from each other

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16
Q

Transverse wave

A

Moving wave, refelected & inverted at a fixed boundary & max & min points change

17
Q

Standing waves

A

Fixed at both ends so they appear stationary

18
Q

Nodes

A

Where wave is at rest & amplitude=0

19
Q

Antinodes

A

Points midway between nodes & fluxuate with max amplitude

20
Q

Frequencies audible for healthy adults

A

20 to 20,000 Hz

21
Q

Forced oscillation

A

If a periodically varying force is applied to a system, the system will then be driven at a frequency equal to the frequency of the force

22
Q

Resonation

A

When the frequency of the periodic force is equal to a natural frequency of the system & amplitude is maximum

23
Q

Dampening/attenuation

A

Decrease in amplitude of a wave caused by a applied or non-conservative force

MCAT physics & math (9 decks)

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