Flashcards in science waves and sound Deck (99)
the ability to do work
a disturbance that transfers energy from place to place
the material through which a wave travels
What is the medium for sound waves?
What is the material through which water waves travel?
along the water surface
Waves that travel through a medium are what kind of waves? Does the medium move with the mechanical wave?
mechanical waves - no
Give an example of an electromagnetic wave that can travel through empty space.
What type of wave can travel without a medium?
electromagnetic waves - light
Why doesn't the medium travel with the wave?
The wave transfers the energy to the medium's particles.
What is necessary to cause a wave?
energy causes a medium to vibrate
What is vibration?
a repeated back and forth or up and down motion
What are the two types of mechanical waves, and how are they classified?
transverse waves - - moves at right angles to the direction the wave is traveling
longitudinal waves - move parallel to direction wave is traveling
What is the high point on a transverse wave?
What is the low point on a transverse wave?
What do we call the coils in a longitudinal wave that are closer together?
What do we call the coils in a longitudinal wave that are further apart?
Is sound a longitudinal or a transverse wave?
What is amplitude of a transverse wave?
the height of the crest or the depth of a trough
What is the amplitude of a longitudinal wave?
the density of the compression or how spread out the rarefaction
What increases the amplitude of a wave?
What is the distance between two corresponding parts of a wave?
crest to crest or trough to trough or distance between compressions
the number of waves that pass a given point in a certain amount of time
What unit is frequency measured in?
hertz (Hz), waves per second
What is the relationship between speed, wavelength, and frequency
speed = wavelength X frequency
What happens to the speed of a wave at a constant temperature and pressure if the medium doesn't change?
speed is constant
when an object or a wave hits a surface through which it cannot pass it bounces back and is called what
Give 2 examples of reflections.
ball bouncing off a wall
echo of sound
What is the law of reflection?
angle of incidence equals the angle of reflection
Where is the line of "normal?"