Numeric Questions
A wave traveling at 10 m/s has a frequency of 0.5Hz. What is it´s wavelength?
20m
The rate at which a waves covers a distance
Wave speed
The base units measuring velocity
What are m/s (meters per second)
A type of wave that can travel through empty space
What are light waves? (electromagnetic waves)
The number of different waves caused by an earthquake
3
Waves are produced with a frequency of 10Hz. What is the period of a single wave?
0.1s
The maximum displacment of a wave
Amplitude
If an object's velocity is not uniform it is either ____ or _____.
Accelerating or decelerating
This occurs when a wave changes speed when passing through a different medium
What is refraction?
The fastest of the earthquake waves
P-waves (primary)
A series of waves are produced with a frequency of 10Hz. How many waves will have been produced after 1 minute?
600
Vector
The variable "k" in Hooke's Law
Occurs when longitudinal waves curve or bend around a corner or obstacle
What is a diffraction?
This earthquake wave is transverse
S-waves (secondary)
A wave with an amplitude of 2cm interferes with a wave of amplitude -2cm traveling in the oppsite direction. What is the amplitude of the resultant wave?
0 cm (complete destructive interference will occur)
The change in direction and speed of a wave as it passes into a medium of a different density
Refraction
?=ma
What is Force?
The type of wave caused by a perpendicular disturbance
This is how humans can pinpoint where an earthquake occurs
Triangulation (via 3 different seismograms)
If a bat sends out a high pitch noise at 340 m/s and it gets reflected off an insect and returns to the bat's ears in 0.15s, the insect is this far away from the bat
What is 51m?
The area of a longitudinal wave where particles are furthers apart and density is at its lowest.
Rarefaction
If one variable increases as the other decreases these variables are proportional in this way
What is inversely proportional?
The instrument used in detecting earthquake waves
What is a seismograph?
The two things we've discovered about the earth's composition through studying earthquakes
1. Plate tectonics
2. A solid iron core w/ a molten layer around it