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Physics 1 > Lesson 3 (Part 1) > Flashcards

Lesson 3 (Part 1) Flashcards

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1
Q

What are 4 examples of sound properties?

A
  1. Frequency
  2. Period
  3. Wavelength
  4. Propagation speed
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2
Q

What are 2 forms of waves?

A
  1. Mechanical

2. Electromagnetic

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3
Q

Mechanical wave (2)

A
  1. Needs a medium

2. Requires a physical interaction

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4
Q

Electromagnetic waves

A

Work in a medium or a vacuum

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5
Q

Waves

A

Transfer energy from one location to another

- cyclical

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6
Q

What are 2 forms of mechanical waves?

A
  1. Longitudinal waves

2. Transverse waves

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7
Q

What is an example of a longitudinal wave?

A

Sound

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8
Q

Which direction do particles vibrate in a longitudinal wave?

A

Back and forth

- parallel to the direction of travel

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9
Q

What direction do particles move in a transverse wave?

A

Up and down

- perpendicular to the direction of travel

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10
Q

What is an example of a mechanical wave?

A

Ultrasound

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11
Q

Compressional

A

When areas are closer together creating high pressure and a high density

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12
Q

Rarefaction

A

Areas that are farther apart creating low pressure and low density

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13
Q

What are 3 examples of acoustic variables?

A
  1. Pressure
  2. Density
  3. Particle motion/vibration
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14
Q

Where on the wavelength is there high density?

A

Crest

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15
Q

Where on the wavelength is there low density?

A

Trough

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16
Q

Where on the wavelength is the baseline?

A

Neutral

- middle

17
Q

Density

A

Concentration of matter

- high and low

18
Q

Particle motion/vibration

A

Oscillation

19
Q

What is the formula for pressure?

A

P = F/A

  • P = pressure
  • F = force
  • A = area
20
Q

What is the unit for pressure?

A

N/m^2

- pascal (Pa)

21
Q

What is the formula for density?

A

D = M/V

  • D = density
  • M = mass
  • V = volume
22
Q

What is the unit for density?

A

Kg/m^3

23
Q

Cycle

A

Is one complete variation in pressure/density

24
Q

What are the repetitive loops called?

A

Sinusoidal waveform

25
Q

Frequency

A

Is a measure of how often something happens over time

26
Q

What is another way to write Hz?

A

1/s

27
Q

What is another way to write KHz?

A

1/ms

28
Q

What is another way to write MHz?

A

1/us

29
Q

Infrasound

A

Is a sound of a frequency too low for human hearing

30
Q

Ultrasound

A

Is a sound of a frequency too hight for human hearing

Physics 1 (42 decks)

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