4.1 Flashcards

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1
Q

How is sound caused?

A

Sound is caused by the vibration of particles moving in a wave-like motion.

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2
Q

What happens when an object vibrates?

A

When an object vibrates, the vibration causes particles in the air to compress together (compression) and then move apart (rarefaction) in a longitudinal wave.

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3
Q

Define amplitude.

A

The amplitude of a wave is the maximum distance it extends beyond its middle position.

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4
Q

Are sound waves latitudinal or longitudinal?

A

Sound waves are longitudinal.

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5
Q

What is wavelength and how is it measured?

A

Wavelength is the distance between the same point on adjacent waves. Wavelength is measured in metres.

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6
Q

What is frequency, how is it measured and how does it affect pitch?

A

Frequency is the number of waves produced each second.

Frequency is measured in Hertz (Hz). Sounds with higher frequency have a higher pitch.

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7
Q

What is ‘f’ in a wave formula?

A

‘f’ is frequency in a wave formula.

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8
Q

What is ‘v’ in a wave formula?

A

‘v’ is velocity in a wave formula.

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9
Q

What is ‘λ’ in a wave formula?

A

‘λ’ is wavelength in a wave formula.

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10
Q

How do you calculate frequency (f) in a wave formula?

A

Frequency (f) = Velocity (v) / Wavelength (λ)

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11
Q

How do you calculate velocity (v) in a wave formula?

A

Velocity (v) = Frequency (f) * Wavelength (λ)

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12
Q

How do you calculate wavelength (λ) in a wave formula?

A

Wavelength (λ) = Velocity (v) / Frequency (f)

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