Waves test
What produces mechanical waves?
vibrating objects
What two things does wave speed depend on?
wavelength and frequency
What is a wave?
-A disturbance that travels from one place to another transporting energy, but not necessarily matter, along with it.
How is the amplitude of transverse wave measured?
Amplitude in a transverse wave is measured by the distance from the rest position of the medium to one of the crests or one of the troughs
What is amplitude?
Amplitude is the maximum distance the particles in a medium move from their rest position as the wave passes through the medium.
How does the wavelength of a wave change if its frequency decreases?
As the frequency of a wave decreases, its wavelength increases.
What is the difference between longitudinal waves that have different amplitudes?
In a higher-amplitude wave, the particles in the compressions are closer together and the particles in the rarefactions are farther apart than in a lower-amplitude wave.
How is wavelength measured in a transverse wave?
In a transverse wave, wavelength is the distance from one crest to the next or from one trough to the next.
If you are measuring the wavelength of a transverse wave, why doesn't it matter whether you measure it between troughs?
The distance in a transverse wave between one crest and the next or one trough and the next will be the same.
What is frequency?
The frequency of a wave is the number of wavelengths that pass by a point each second.
What happens to water when an object hits it?
The impact transfers energy to the water, pushing and pulling on the water particles.
How can you tell which has greater amount of energy when two longitudinal waves are traveling through the same medium?
The larger the amplitude of a wave is, the more energy it has.
What happens to the raft, shown in the figure, when the wave transfers energy to it.
The raft moves up and down.
What is a wavelength?
The wavelength of a wave is the distance from one point on a wave to the same point on the next wave. Crest to Crest or Trough to Trough
What is the difference in a transverse wave and a longitudinal?
Transverse waves have crests and troughs as particles move perpendicular to the wave's direction, whereas longitudinal waves have compressions and rarefactions as the medium moves parallel to the wave's direction.
What is the medium through which the longitudinal wave is moving in the figure?
a spring
What are four properties of waves?
amplitude, wavelength, frequency and speed
Identify a type of wave that can travel through a vacuum?
electromagnetic waves
What do waves transfer from place to place?
energy
What are the frequencies of the waves in each column?
left column: 0.25 Hz; right column: 0.5 Hz Divide the number of wavelengths by the time it takes for those wavelengths to pass.
How do particles move in a longitudinal wave?
parallel to the direction the wave travels
How do particles move in a transverse wave?
perpendicular