Types of Waves
In what type of wave do the particles move perpendicular to the direction of the wave?
Transverse waves
How do you calculate the velocity of a wave?
Multiply frequency and wavelength or divide wavelength by period
Describe one way to calculate the amplitude of a wave.
Crest to trough distance divided by 2 or distance from middle to crest/trough
What happens when a wave is absorbed?
The wave loses energy to the medium due to friction and other dampening forces.
What are rarefractions?
The lowest density parts of a longitudinal wave.
What happens to the wavelength of a wave when its frequency increases but its speed stays the same?
wavelength decreases
Given the same initial energy, will a wave traveling through the ground have a greater or smaller amplitude than a wave traveling through water?
Smaller
What wave behavior does echolocation use?
Wave reflection
What type of wave is a sound wave?
Longitudinal wave
Describe how you can measure the wavelength of a wave without using the crests or troughs.
You can measure from any point on the wave as long as you measure to the same point on the next wave.
Tom has tied a plastic slinky to the end of a metal slinky. Tom then starts a transverse wave by flicking the end of the plastic slinky. What will happen, if anything, to the amplitude of the wave when it reaches the plastic part?
The amplitude will increase
What is the difference between Diffusion and Reflection?
Diffusion makes the waves go in every direction, reflection makes the wave bonce off in mostly one direction
What type of wave is an earthquake?
Both transverse and longitudinal.
Draw a longitudinal wave and label the wavelength.
Correct Drawing
Why do tidal waves have a larger amplitude in the winter when compared to the summer?
Because the earth is closer to the sun in the winter and the sun's gravity causes the tidal waves to have more energy.
How do earplugs work in preventing you from hearing anything? Describe what happens to the waves.
Describe the motion of water waves.
Water waves combine transverse and longitudinal waves and move in a clockwise circle.
Describe the how the period affects the motion of the particles in sound waves and how that affects what you hear.
The period changes the amount of time it takes for the particles to push up close to each other and then move away from each other. With a longer period you will hear a lower pitch.
An engineer is harnessing the power in ocean waves. If the ocean waves are currently 10m high and provide 2 J of energy, how high must the waves be to provide 72 J of energy?
60m
Will a flute playing a really high note or a tuba playing a really low note sound louder to a person that is 10 km away? Why?
The tuba because it is a lower frequency wave so it will lose less energy as it travels resulting in a larger amplitude when it reaches that person.