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Physics Year 10 > Sound > Flashcards

Sound Flashcards

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1
Q

What is the formula to calculate wave speed?

A

Wave speed = frequency × wavelength

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2
Q

Calculate the frequency of a water wave with a speed of 12 m/s and a wavelength of 6 m.

A

2 Hz

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3
Q

Calculate the frequency of a sound wave with a speed of 1500 m/s and a wavelength of 6 km.

A

250 Hz

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4
Q

Calculate the frequency of a sound wave with a speed of 330 m/s and a wavelength of 1.10 m.

A

300 Hz

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5
Q

Calculate the speed of a wave with a frequency of 2 MHz and a wavelength of 80 m.

A

160,000 m/s

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6
Q

Calculate the speed of a wave with a frequency of 50 Hz and a wavelength of 4 m.

A

200 m/s

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7
Q

True or False: The speed of a wave depends on its frequency and wavelength.

A

True

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8
Q

What does the loudness of a sound depend on?

A

Amplitude

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9
Q

What is the decibel scale used for?

A

Measuring sound intensity

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10
Q

Fill in the blank: We hear sounds because our _______ vibrates.

A

ear drum

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11
Q

What are vibrations caused by?

A

Sound waves

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12
Q

Describe how sound travels through different mediums.

A

Sound travels as vibrations through substances.

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13
Q

What is noise often described as?

A

Unpleasant sound

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14
Q

List ways to reduce noise in the home.

A
  • Use carpets
  • Install soundproofing
  • Use quieter appliances
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15
Q

What is a possible consequence of excessive noise exposure?

A

Hearing damage

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16
Q

What happens to sound in a vacuum?

A

It cannot travel

17
Q

What is the relationship between frequency and amplitude in sound waves?

A

Frequency determines pitch; amplitude determines loudness.

18
Q

What is the impact of traffic and planes flying overhead categorized as?

A

Noise pollution

19
Q

What is the main source of sound energy?

A

Vibrations

20
Q

True or False: All sounds are caused by vibrations.

A

True

Physics Year 10 (3 decks)

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