waves Flashcards
Fastest to slowest speed of sound?
Solid, Liquid, gas
Clap echo method
Stand around 50m away from a wall and clap sharply, and time how long it takes for you to clap 11 times.
What is ultrasound?
ultrasound is a sound higher than we can hear.
What is our frequency hearing range?
20Hz-20,000Hz
At what angle does the light come outside the other block?
The same as the entrance angle.
When does refraction occur?
Refraction occurs when light travels from one material to another?
What happens to light as it enters a new material. e.g. Glass
Slows down
Frequency stays the same
Wavelength decreases
Hertz equation
f=1/T
Wavelength equation
f=V/(wavelength)
Where is the epicenter?
Directly above the Earths surface.
What is the focus?
Where the seismic waves are emitted.
What is the study of earthquakes called?
semiology
What is a seismic wave?
The energy transferred makes a shock that travels through the earth and across its surface as a wave.
What are the 3 types of seismic waves?
primary waves
secondary waves
Long waves
When do long waves arrive?
Last
Are long waves violent?
They are very violent and have a up and down movement.
What do you use to measure the seismic waves?
Seismometer
What waves travel through the mantel?
P-waves
S-waves
What are the layers of the earth?
Crust
Mantel
Outer core
Inner core
What happens to P and S waves as they travel through the mantel?
They bend
What waves refract at the boundary between the mantel and the outer core?
p-waves
Why is there a shadow zone?
the existence of the shadow zone shows there is a liquid outer core under the mantel.
What type of wave is a P-wave?
Longitudinal
What type of wave is a S-wave?
transverse
