4.1 Flashcards
How is sound caused?
Sound is caused by the vibration of particles moving in a wave-like motion.
What happens when an object vibrates?
When an object vibrates, the vibration causes particles in the air to compress together (compression) and then move apart (rarefaction) in a longitudinal wave.
Define amplitude.
The amplitude of a wave is the maximum distance it extends beyond its middle position.
Are sound waves latitudinal or longitudinal?
Sound waves are longitudinal.
What is wavelength and how is it measured?
Wavelength is the distance between the same point on adjacent waves. Wavelength is measured in metres.
What is frequency, how is it measured and how does it affect pitch?
Frequency is the number of waves produced each second.
Frequency is measured in Hertz (Hz). Sounds with higher frequency have a higher pitch.
What is ‘f’ in a wave formula?
‘f’ is frequency in a wave formula.
What is ‘v’ in a wave formula?
‘v’ is velocity in a wave formula.
What is ‘λ’ in a wave formula?
‘λ’ is wavelength in a wave formula.
How do you calculate frequency (f) in a wave formula?
Frequency (f) = Velocity (v) / Wavelength (λ)
How do you calculate velocity (v) in a wave formula?
Velocity (v) = Frequency (f) * Wavelength (λ)
How do you calculate wavelength (λ) in a wave formula?
Wavelength (λ) = Velocity (v) / Frequency (f)
